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Karmiris E, Tsiogka A, Tsiripidis K, Papakonstantinou E, Georgalas I, Chalkiadaki E. Correlations of Corneal Endothelial Morphology and Corneal Thickness With Anterior Segment Parameters in Healthy Individuals. Cornea 2024; 43:764-770. [PMID: 38478761 DOI: 10.1097/ico.0000000000003515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 01/19/2024] [Indexed: 05/08/2024]
Abstract
PURPOSE The purpose of this study was to investigate the associations between central corneal endothelial cell density (ECD), endothelial morphology, and corneal thickness (central corneal thickness) with the anterior chamber depth, corneal volume (CV), white-to-white (WTW) distance, mean anterior chamber angle (CAmean), and gender in healthy individuals. METHODS This observational study included 136 healthy volunteers. The ECD, coefficient of variation of cell area, and hexagonal cell appearance ratio (%Hex) were measured by means of specular microscopy. The central corneal thickness, anterior chamber depth, CV, WTW distance, and the angle width of 12 points were taken by the Pentacam HR Scheimpflug anterior segment imaging. The arithmetical mean of the 12 points was considered as the CAmean. We used mixed effect linear regression model for the statistical analysis of the data. RESULTS ECD was positively correlated with CV ( P = 0.028), while after adjusting for age, it was negatively correlated with age ( P < 0.001). Coefficient of variation of cell area was positively correlated with CAmean ( P = 0.036), while after adjusting for age, it was positively correlated with age ( P < 0.001) and CAmean ( P = 0.005). Hex was negatively correlated with WTW ( P = 0.023) and CAmean ( P = 0.025), and after adjusting for age, this correlation remained the same ( P = 0.029 when correlated with WTW and P = 0.035 with CAmean). CONCLUSIONS There were significant changes in the morphology of the corneal endothelial cells in eyes with wider anterior chamber angle. Greater pleomorphism and polymegethism of the corneal endothelium was observed in healthy patients with wider CAmean. Deepening of the anterior chamber as myopia progresses could render the corneal endothelium more fragile and susceptible to mechanical stress, which is an area worthy of further study.
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Affiliation(s)
- Efthymios Karmiris
- Department of Ophthalmology, 251 Hellenic Airforce General Hospital, Athens, Greece
| | - Anastasia Tsiogka
- Department of Ophthalmology, 401 General Military Hospital of Athens, Greece; and
| | | | - Evangelia Papakonstantinou
- Department of Ophthalmology, National and Kapodistrian University of Athens, General Hospital "G. Gennimatas", Athens, Greece
| | - Ilias Georgalas
- Department of Ophthalmology, National and Kapodistrian University of Athens, General Hospital "G. Gennimatas", Athens, Greece
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Wang D, Chang Y, Nan W, Zhang Y. Comparative analysis of corneal parameters in simple myopic anisometropia using Scheimpflug technology. Front Bioeng Biotechnol 2024; 12:1366408. [PMID: 38840667 PMCID: PMC11150699 DOI: 10.3389/fbioe.2024.1366408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 05/06/2024] [Indexed: 06/07/2024] Open
Abstract
Purpose This study aims to investigate the differences in binocular corneal parameters and their interrelation with binocular biometric parameters asymmetry in patients with simple myopic anisometropia, thereby elucidating the influence of myopia process on various corneal parameters. Methods In this cross-sectional study, 65 patients with anisometropia in monocular myopia were included. They were divided into low anisometropia group: 3.00D<Δ spherical equivalent (SE)≤-1.00D (Δ represents the difference between the two eyes, i.e., myopic data minus emmetropic data) and high anisometropia group: ΔSE ≤ -3.00D. Corneal and ocular biometric parameters were measured using Pentacam, Corvis ST, and IOL Master 700. Statistical analyses focused on the binocular corneal parameters asymmetry, using the contralateral emmetropia as a control. Results The mean age of participants was 18.5 ± 1.3 years, with the average SE for myopia and emmetropia being -2.93 ± 1.09D and -0.16 ± 0.41D, respectively. The central corneal thickness (CCT), flat keratometry (Kf), keratometry astigmatism (Ka), total corneal aberration (6 mm) (TOA), surface variance index (ISV), vertical asymmetry index (IVA), stress-strain index (SSI), and first applanation stiffness parameter (SPA1) and ambrosia relational thickness-horizontal (ARTh) showed significant differences between anisometropic fellow eyes (p < 0.05). There were significant differences in ΔIVA, Δ the difference between the mean refractive power of the inferior and superior corneas (I-S), Δ deviation value of Belin/Ambrósio enhanced ectasia display (BAD-D), Δ deformation amplitude ratio max (2 mm) (DAR)and Δ tomographic biomechanical index (TBI) (p < 0.05) in two groups. Asymmetry of corneal parameters was correlated with asymmetry of ocular biometric parameters. Anisometropia (ΔSE) was positively correlated with ΔIVA (r = 0.255, p = 0.040), ΔBAD-D (r = 0.360, p = 0.006), and ΔSSI (r = 0.276, p = 0.039) and negatively correlated with ΔDAR (r = -0.329, p = 0.013) in multiple regression analysis. Δ mean keratometry (Km), Δ anterior chamber depth (ACD), and Δ biomechanically corrected intraocular pressure (bIOP) were also associated with binocular corneal differences. Conclusion Compared to contralateral emmetropia, myopic eyes have thinner corneas and smaller corneal astigmatism. Myopic corneas exhibit relatively more regular surface morphology but are more susceptible to deformation and possess marginally inferior biomechanical properties. In addition, there is a certain correlation between anisometropia and corneal parameter asymmetry, which would be instrumental in predicting the development of myopia.
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Affiliation(s)
- Di Wang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Yue Chang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Weijin Nan
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yan Zhang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Mu J, Zhang Z, Wu X, Chen S, Geng H, Duan J. Refraction and ocular biometric parameters in 3-to 6-year-old preschool children : a large-scale population-based study in Chengdu, China. BMC Ophthalmol 2024; 24:207. [PMID: 38711043 DOI: 10.1186/s12886-024-03467-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 04/24/2024] [Indexed: 05/08/2024] Open
Abstract
PURPOSE To understand the ocular biometric parameters characteristics and refractive errors in 3-to 6-year-old preschool children in Chengdu, China, and to investigate the prevalence of refractive errors. METHOD A school-based cross-sectional study was conducted in Chengdu from 2020 to2022 with a total of 666 kindergartens. All children were measured by non-cycloplegic autorefraction and uncorrected visual acuity (UCVA) and ocular biometric parameters. Finally, univariate linear regression models were used to analyze the relationship between ocular biometric parameters and refraction. RESULTS A total of 108,578 preschool children aged 3-6 underwent examinations, revealing a myopia prevalence of 6.1%. The mean axial length (AL), keratometry (K), corneal radius (CR), axial length/corneal radius (AL/CR) Ratio, central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), and vitreous chamber depth (VCD) were 22.35 ± 0.69 mm, 43.35 ± 1.58 D, 7.80 ± 0.28 mm, 2.87 ± 0.08, 533.31 ± 32.51 μm, 2.70 ± 0.28 mm, 3.91 ± 0.27 mm, and 15.20 ± 0.68 mm, respectively. With increasing age, AL, CR, AL/CR ratio, CCT, ACD, LT, and VCD also increased. Regardless of age, males consistently exhibited longer AL, flatter corneal curvature, shallower ACD, thicker CCT, thinner LT, and longer VCD compared to females. AL, K, CR, LT, and VCD all showed significant linear relationships with SE (all P < 0.001) in univariate linear regression analysis after adjusting for gender and age. CONCLUSION The prevalence of myopia among preschool children aged 3-6 in Chengdu is relatively low. Ocular biometric parameters affecting refractive errors include AL, K, CR, LT, and VCD. The preschool period serves as a critical phase for myopia prevention and control.
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Affiliation(s)
- Jingyu Mu
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection with TCM Laboratory, Chengdu, Sichuan, China
- Retinal Image Technology and Chronic Vascular Disease Prevention & Control and Collaborative Innovation Center, Chengdu, Sichuan, China
| | | | - Xiaoxiao Wu
- Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection with TCM Laboratory, Chengdu, Sichuan, China
| | - Siyu Chen
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection with TCM Laboratory, Chengdu, Sichuan, China
- Retinal Image Technology and Chronic Vascular Disease Prevention & Control and Collaborative Innovation Center, Chengdu, Sichuan, China
| | - Haoming Geng
- Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection with TCM Laboratory, Chengdu, Sichuan, China
| | - Junguo Duan
- Chengdu University of TCM, Chengdu, Sichuan, China.
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China.
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China.
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection with TCM Laboratory, Chengdu, Sichuan, China.
- Retinal Image Technology and Chronic Vascular Disease Prevention & Control and Collaborative Innovation Center, Chengdu, Sichuan, China.
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Jiang L, Du Z, Sun W, Zhu S, Xiong L, Fang X, Zhou J, Zhang Q, Lei X, Zeng Q, Wang Z, Hu Y. Associations between corneal curvature and other anterior segment biometrics in young myopic adults. Sci Rep 2024; 14:8305. [PMID: 38594402 PMCID: PMC11004108 DOI: 10.1038/s41598-024-59037-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 04/05/2024] [Indexed: 04/11/2024] Open
Abstract
To investigate the associations between corneal curvature (CC) and other anterior segment biometrics in young myopic adults. In this retrospective multi-center study, 7893 young myopic adults were included. CC and other anterior segment biometrics were measured by Scheimpflug imaging (Pentacam). CC was defined as SimK at central 3 mm area, and other anterior segment biometrics included white-to-white corneal diameter (WTW), central corneal thickness (CCT), corneal volume (CV) at 3 mm, 5 mm, and 7 mm area, anterior corneal astigmatism (ACA), posterior corneal astigmatism (PCA), anterior corneal eccentricity (ACE) and asphericity (ACAP), posterior corneal eccentricity (PCE) and asphericity (PCAP), anterior chamber depth (ACD), and anterior chamber volume (ACV). Univariate regression analyses were used to assess the associations between CC and other anterior segment biometrics, and multivariate regression analyses were further performed to adjusted for age, gender and spherical equivalent. CC was higher in patients of female gender and higher myopia (all P < 0.05). Eyes in higher CC quartiles had lower WTW, thinner CCT, lower CV at 3 mm and 5 mm, lower ACD, and lower ACV (all P < 0.001), but had larger ACA, larger PCA, less PCE and less PCAP (all P < 0.001), compared to eyes in lower CC quartiles. The trends of CV at 7 mm, ACE and ACAP were inconsistent in different CC quartiles. After adjusting for age, gender and spherical equivalent with multivariate linear regression, CC was positively correlated to CV at 7 mm (βs = 0.069), ACA (βs = 0.194), PCA (βs = 0.187), ACE (βs = 0.072), PCAP (βs = 0.087), and ACD (βs = 0.027) (all P < 0.05), but was negatively correlated to WTW (βs = - 0.432), CCT (βs = - 0.087), CV-3 mm (βs = - 0.066), ACAP (βs = - 0.043), PCE (βs = - 0.062), and ACV (βs = - 0.188) (all P < 0.05). CC was associated with most of the other anterior segment biometrics in young myopic adults. These associations are important for better understanding of the interactions between different anterior segment structures in young myopic patients, and are also useful for the exploration of the pathogenesis of myopia.
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Affiliation(s)
- Li Jiang
- Aier Eye Hospital of Wuhan University (Wuhan Aier Eye Hospital), Wuhan, China
- Refractive Surgery Center, Hankou Aier Eye Hospital, Wuhan, China
| | - Zijing Du
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Wei Sun
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Shanqing Zhu
- Aier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China
| | - Lu Xiong
- Aier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China
| | - Xuejun Fang
- Refractive Surgery Center, Shenyang Aier Eye Hospital, Shenyang, China
| | - Jin Zhou
- Refractive Surgery Center, Chengdu Aier Eye Hospital, Chengdu, China
| | - Qingsong Zhang
- Aier Eye Hospital of Wuhan University (Wuhan Aier Eye Hospital), Wuhan, China
| | - Xiaohua Lei
- Aier Eye Hospital of Wuhan University (Wuhan Aier Eye Hospital), Wuhan, China
- Refractive Surgery Center, Hankou Aier Eye Hospital, Wuhan, China
| | - Qingyan Zeng
- Aier Eye Hospital of Wuhan University (Wuhan Aier Eye Hospital), Wuhan, China.
- Refractive Surgery Center, Hankou Aier Eye Hospital, Wuhan, China.
| | - Zheng Wang
- Aier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China.
| | - Yijun Hu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China.
- Aier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China.
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Kneepkens SCM, Marstal K, Polling JR, Jaddoe VWV, Vernooij MW, Poot DHJ, Klaver CCW, Tideman JWL. Eye Size and Shape in Relation to Refractive Error in Children: A Magnetic Resonance Imaging Study. Invest Ophthalmol Vis Sci 2023; 64:41. [PMID: 38153751 PMCID: PMC10756250 DOI: 10.1167/iovs.64.15.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/28/2023] [Indexed: 12/29/2023] Open
Abstract
Purpose The purpose of this study was to determine the association between eye shape and volume measured with magnetic resonance imaging (MRI) and optical biometry and with spherical equivalent (SE) in children. Methods For this study, there were 3637 10-year-old children from a population-based birth-cohort study that underwent optical biometry (IOL-master 500) and T2-weighted MRI scanning (height, width, and volume). Cycloplegic refractive error was determined by automated refraction. The MRI images of the eyes were segmented using an automated algorithm combining atlas registration with voxel classification. Associations among optical biometry, anthropometry, MRI measurements, and RE were tested using Pearson correlation. Differences between refractive error groups were tested using ANOVA. Results The mean volume of the posterior segment was 6350 (±680) mm3. Myopic eyes (SE ≤ -0.5 diopters [D]) had 470 mm3 (P < 0.001) and 970 mm3 (P < 0.001) larger posterior segment volume than emmetropic and hyperopic eyes (SE ≥ +2.0D), respectively. The majority of eyes (77.1%) had an oblate shape, but 47.4% of myopic eyes had a prolate shape versus 3.9% of hyperopic eyes. The correlation between SE and MRI-derived posterior segment length (r -0.51, P < 0.001) was stronger than the correlation with height (r -0.30, P < 0.001) or width of the eye (r -0.10, P < 0.001). Conclusions In this study, eye shape at 10 years of age was predominantly oblate, even in eyes with myopia. Of all MRI measurements, posterior segment length was most prominently associated with SE. Whether eye shape predicts future myopia development or progression should be investigated in longitudinal studies.
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Affiliation(s)
- Sander C. M. Kneepkens
- Department of Ophthalmology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
- The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Kasper Marstal
- Department of Ophthalmology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Medical Informatics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Jan-Roelof Polling
- Department of Ophthalmology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Orthoptics, School of Applied Science Utrecht, Utrecht, The Netherlands
| | - Vincent W. V. Jaddoe
- The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Meike W. Vernooij
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Radiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Dirk H. J. Poot
- Department of Medical Informatics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Caroline C. W. Klaver
- Department of Ophthalmology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
- The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Ophthalmology, Radboud University Medical Center, Nijmegen, The Netherlands
- Institute of Molecular and Clinical Ophthalmology, Basel, Switzerland
| | - J. Willem L. Tideman
- Department of Ophthalmology, Erasmus University Medical Center, Rotterdam, The Netherlands
- The Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands
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Zhang Z, Mu J, Wei J, Geng H, Liu C, Yi W, Sun Y, Duan J. Correlation between refractive errors and ocular biometric parameters in children and adolescents: a systematic review and meta-analysis. BMC Ophthalmol 2023; 23:472. [PMID: 37990308 PMCID: PMC10662558 DOI: 10.1186/s12886-023-03222-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/14/2023] [Indexed: 11/23/2023] Open
Abstract
BACKGROUND Refractive errors are one of the most common ocular conditions among children and adolescents, with myopia showing an increasing prevalence and early onset in this population. Recent studies have identified a correlation between refractive errors and ocular biometric parameters. METHODS A systematic search was conducted in electronic databases including PubMed, EMBASE, Cochrane Library, Web of Science, and Medline from January 1, 2012, to May 1, 2023. Various ocular biometric parameters were summarized under different refractive states, including axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), corneal curvature (CC), Corneal curvature radius (CR),axial length-to-corneal radius ratio (AL/CR ratio), choroidal thickness (ChT), retinal thickness (RT), retinal nerve fiber layer thickness (RNFL), and retinal blood density (VD). The differences in these parameters among different refractive states were analyzed using Stata software with fixed or random-effects models, taking into account the assessed heterogeneity level. RESULTS This meta-analysis included a total of 69 studies involving 128,178 eyes, including 48,795 emmetropic eyes, 60,691 myopic eyes, 13,983 hyperopic eyes, 2,040 low myopic eyes, 1,201 moderate myopic eyes, and 1,468 high myopic eyes. The results of our study demonstrated that, compared to the control group (emmetropic group), the myopic group and low, moderate, and high myopic groups showed significant increases in AL, AL/CR ratio, and ACD, while the hyperopic group exhibited significant decreases. Compared to the control group, the myopic group had a significantly increase for CC, while CR, CCT, perifoveal RT, subfoveal ChT, foveal ChT, parafoveal ChT, perifoveal (except nasal) ChT, and pRNFL (except temporal) significantly decreased. Compared to the control group, the hyperopic group had a significantly increase for subfoveal ChT, foveal ChT, parafoveal ChT, perifoveal ChT, and nasal pRNFL. Compared to the control group, the low and moderate myopic groups had a significantly decreases for the CCT, parafoveal RT (except nasal), perifoveal RT (except nasal), and pRNFL (except superior and temporal). Compared to the control group, the high myopic group had a significantly increase for CR, while LT, perifoveal ChT (except nasal), parafoveal RT, perifoveal RT, and pRNFL (except temporal) had significant decreased. CONCLUSION The changes of ocular biometric parameters in children and adolescents are closely related to refractive errors. Ocular biometric parameters devices, as effective non-invasive techniques, provide objective biological markers for monitoring refractive errors such as myopia.
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Affiliation(s)
- Zengrui Zhang
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Jingyu Mu
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Jing Wei
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Haoming Geng
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Chunmeng Liu
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Wenhua Yi
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Yue Sun
- Chengdu University of TCM, Chengdu, Sichuan, China
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China
| | - Junguo Duan
- Chengdu University of TCM, Chengdu, Sichuan, China.
- Eye college of Chengdu University of TCM, Chengdu, Sichuan, China.
- Ineye Hospital of Chengdu University of TCM, Chengdu, Sichuan, China.
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection with TCM Laboratory, Chengdu, Sichuan, China.
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Qi DM, Huo SJ, Yu T. Pupillary capture following sutureless scleral-fixated intraocular lens in children with Marfan syndrome. Int J Ophthalmol 2023; 16:1789-1793. [PMID: 38028516 PMCID: PMC10626357 DOI: 10.18240/ijo.2023.11.08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 08/04/2023] [Indexed: 12/01/2023] Open
Abstract
AIM To compare the clinical outcomes between two approaches for sutureless scleral-fixated intraocular lens (SFIOL) in children with Marfan syndrome (MFS). METHODS The study included 15 children (26 eyes) with lens subluxation due to MFS. These children underwent lensectomy, anterior vitrectomy, and sutureless SFIOL. According to the position of placement of intraocular lens (IOL) haptics, two study groups were reviewed for best corrected visual acuity (BCVA) and postoperative complications: group A, 14 eyes with haptics fixated at 2.0 mm from the limbus; group B, 12 eyes with the haptics fixated at 2.5 mm from the limbus. RESULTS The mean axial length for all patients was 25.66±2.35 mm. Postoperative BCVA in logMAR were significant improved in both groups (0.77±0.32 to 0.17±0.12 in group A, 0.66±0.25 to 0.24±0.12 in group B, both P<0.001) while no significant difference between two groups (P>0.05). Pupillary capture was main postoperative complication, occurring between 3d and 18mo. It occurred in 7 eyes in group A and one eye in group B (P=0.02). CONCLUSION Sutureless SFIOL is an effective treatment approach for lens subluxation in children with MFS. Pupillary capture is the main postoperative complication. Fixated IOL haptics at 2.5 mm from the limbus can reduce the occurrence of pupillary capture.
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Affiliation(s)
- Dong-Mei Qi
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Shu-Jia Huo
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Tao Yu
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
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Key Factors in Early Diagnosis of Myopia Progression within Ocular Biometric Parameters by Scheimpflug Technology. Life (Basel) 2023; 13:life13020447. [PMID: 36836804 PMCID: PMC9960747 DOI: 10.3390/life13020447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/08/2023] Open
Abstract
The aim of this study was to evaluate the relationship between myopia and ocular biometric variables using the Pentacam AXL® single rotation Scheimpflug camera. This prospective, cross-sectional, single-center study was performed in fifty Caucasian patients aged between 18 and 30 years (24.84 ± 3.04 years). The measured variables included maximum and minimum keratometry (K1 and K2, respectively), anterior chamber depth (ACD), corneal horizontal diameter or white to white (WTW), central corneal thickness (CCT), corneal asphericity (Q), and axial length (AXL). The tomographic and biometric measurements were considered optimal when the quality factor was greater than 95% according to the manufacturer's software instructions. The AXL presented a significant correlation with the spherical equivalent without cycloplegia (SE without CP), age at onset of myopia (r = -0.365, p = 0.012), mean keratometry (Km) (r = -0.339, p = 0.016), ACD (r = 0.304, p = 0.032), and WTW (r = 0.406, p = 0.005). The eyes with AXL higher than 25 mm had earlier onset; higher SE without CP, AXL, and Q; and a flatter Km. AXL is the biometric variable with the greatest influence on the final refractive state in the adult myopic eye. Ophthalmologists and optometric management must consider these biometric differences in order to identify the most appropriate correction techniques in each case. The use of the Pentacam AXL in ocular biometric measurement is effective, reproducible, and non-invasive.
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Yang S, Jiang Y, Cui G, Li Y. Age- and gender-related characteristics of astigmatism in a myopic population. Front Med (Lausanne) 2022; 9:1011743. [PMID: 36313989 PMCID: PMC9606395 DOI: 10.3389/fmed.2022.1011743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 09/26/2022] [Indexed: 11/30/2022] Open
Abstract
Purpose To explore age- and gender-related differences of refractive and corneal astigmatism in myopic patients looking for refractive surgery. Design A retrospective cross-sectional study. Materials and methods The medical files of candidates looking for corneal refractive surgery between 2019 and 2021 were reviewed, demographic and refractive parameters including age, gender, refractive status, and corneal parameters were analyzed. Results A total of 1,417 eyes of 1,417 patients (453 males and 964 females) were included. Males had thicker cornea than females, while females had steeper cornea than males, there was no gender-related difference in refractive and corneal astigmatism depending on patients’ age. There was no difference in refractive astigmatism among different age group from 18 to 50 years, while corneal astigmatism had a shift from with-the rule (WTR) to against-the-rule (ATR) with increasing age. Age, central corneal thickness (CCT), sphere, refractive astigmatism (RA), and corneal curvature (Km) were correlated with corneal astigmatism (CA) (standardized coefficients of are 0.006, p = 0.011 for age, −0.001, p = 0.004 for CCT, and −0.027, p < 0.001 for sphere, 0.61, p < 0.001 for RA, −0.05, p < 0.001 for corneal curvature). Conclusion Refractive astigmatism is stable until the age of 50 years in myopic patients looking for refractive surgery, while corneal astigmatism showed a shift from WTR to ATR with advancing age. Age, CCT, sphere, refractive astigmatism and corneal curvature (Km) were correlated with corneal astigmatism.
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10
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Norhani M, Low YC, Bariah MA, Mizhanim MS, Norlaili A. Corneal endothelial morphology of healthy myopic Malaysian children of Chinese ethnicity aged 8-9 years and its association with axial length. F1000Res 2022; 11:339. [PMID: 36111215 PMCID: PMC9459173 DOI: 10.12688/f1000research.110560.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/23/2022] [Indexed: 11/20/2022] Open
Abstract
Background: This is a cross-sectional study to further understand the effects of axial length elongation on the corneal endothelial cell’s morphology in myopic children. Abnormal changes in the morphology of corneal endothelium are indicators of corneal stress or instability which could be linked to myopia. Methods: 111 school children comprising of 37 emmetropes, 37 mild myopes and 37 moderate myopes aged 8-9 years old were recruited. Visual acuity was measured using the LogMar chart, cycloplegic refraction was determined using an open-field autorefractor (Grand Seiko WAM-5100, Hiroshima, Japan) and refined using subjective refraction. Morphology of corneal endothelial cells [endothelial cell density, coefficient of variation, hexagonality and central corneal thickness] was evaluated using a non-contact specular microscope (Topcon SP-2000P). Axial length was measured with A-scan ultrasound biometry (PacScan Plus, Sonomed Escalon, NY). The correlation between morphology of corneal endothelial cells and axial length were assessed using Pearson Correlation and Linear regression analysis. Results: There was no significant difference in corneal endothelial cells and axial length between gender (p>0.05). Significant reduction in endothelial cells density and hexagonality and increased coefficient of variation was found in eyes of higher myopic power which had longer axial when compared to emmetropes (p<0.001). Except for central corneal thickness, all corneal endothelial cells parameters correlated significantly with axial length (p<0.05). For every 1mm increase in axial length, endothelial cells density decreased by 73.27cells/mm2, hexagonality decreased by 2.32% and coefficient of variation increased by 1.75%. Conclusions: There were significant changes in morphology of cornea endothelial cells in young moderate myopic children of Chinese ethnicity at 8-9 years of age. This result provides normative data for Malaysian children of Chinese ethnicity that can be used for comparison and reference for clinical procedures, thereby facilitating decision-making with respect to interventions for myopia control, especially in prescribing contact lens for children.
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Affiliation(s)
- Mohidin Norhani
- Centre of Optometry, Faculty of Health Science, Universiti Teknologi MARA, Puncak Alam Campus, Selangor, 42300, Malaysia
| | - Yu Chen Low
- Optometry and Vision Science Program, Research Centre for Community Health, Faculty of Health Science, Universiti Kebangsaan Malaysia, Kuala Lumpur, 50300, Malaysia
| | - Mohd-Ali Bariah
- Optometry and Vision Science Program, Research Centre for Community Health, Faculty of Health Science, Universiti Kebangsaan Malaysia, Kuala Lumpur, 50300, Malaysia
| | - Mohamad Shahimin Mizhanim
- Optometry and Vision Science Program, Research Centre for Community Health, Faculty of Health Science, Universiti Kebangsaan Malaysia, Kuala Lumpur, 50300, Malaysia
| | - Arif Norlaili
- Optometry and Vision Science Program, Research Centre for Community Health, Faculty of Health Science, Universiti Kebangsaan Malaysia, Kuala Lumpur, 50300, Malaysia
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11
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Comment on: The effect of home education on myopia progression in children during the COVID-19 pandemic. Eye (Lond) 2022; 36:2225. [PMID: 35352012 PMCID: PMC8961080 DOI: 10.1038/s41433-022-02042-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 03/17/2022] [Accepted: 03/17/2022] [Indexed: 11/16/2022] Open
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12
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Clinical findings of acute acquired comitant esotropia in young patients. Jpn J Ophthalmol 2021; 66:87-93. [PMID: 34655005 DOI: 10.1007/s10384-021-00879-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 08/26/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE This study aimed to identify the characteristics of acute acquired comitant esotropia (AACE) in young patients from a single institution; and clarify their relationship with the excess use of digital devices. STUDY DESIGN Retrospective, observational. METHODS We extracted the clinical charts of patients aged between 5 and 35 years who presented at the Hamamatsu University Hospital with AACE symptoms from January 1, 2015 to December 31, 2018. The age of onset, angle of deviation, refractive errors, history of near work, including excess smartphone use, and treatment modality were retrieved. Patients were divided into three groups: CHILD (aged 5-12 years), JUNIOR (aged 13-17 years), and ADULT (aged 18-35 years) and statistically analyzed with Kruskal-Wallis test. RESULTS Forty-one patients were retrieved, with a mean age at onset of 15.8 (5-28) years; eight in the CHILD group, 23 in the JUNIOR group, and 10 in the ADULT group. Refractive errors and age of patients were correlated, but were not significantly different among groups. The mean angle of deviation at distance was 28.0 ± 12.8 prism diopters (PD) and 28.6 ± 17.2 PD at near. The CHILD group showed the largest near-distant dissociation. History of excessive near work was found in all groups. CONCLUSION AACE was most commonly found in the JUNIOR group, especially those aged 15-16 years. AACE may encompass multiple diseases; using common diagnostic criteria and asking common questions regarding digital device usage is necessary to clarify the influence of digital device usage, and a multicenter prospective study is recommended.
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13
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Smid LM, Vermeer KA, Missotten TOAR, van Laar JAM, van Velthoven MEJ. Parafoveal Microvascular Alterations in Ocular and Non-Ocular Behҫet's Disease Evaluated With Optical Coherence Tomography Angiography. Invest Ophthalmol Vis Sci 2021; 62:8. [PMID: 33666648 PMCID: PMC7938019 DOI: 10.1167/iovs.62.3.8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Purpose To compare quantitative optical coherence tomography angiography (OCT-A) measurements of the parafoveal microvasculature in retinal capillary plexuses among Behҫet uveitis (BU) patients, non-ocular Behҫet's disease (NOBD) patients, and healthy volunteers (HVs). Methods Sixty-eight subjects were enrolled in this prospective observational cross-sectional study. OCT-A imaging was performed using the Heidelberg Engineering Spectralis OCT. A custom algorithm was developed to calculate the vessel density (VD) in three retinal vascular layers: deep capillary plexus, intermediate capillary plexus, and superficial vascular plexus. The foveal avascular zone (FAZ) and acircularity index were calculated for the whole retinal vascular complex. Results We analyzed one eye from 21 BU patients (age, 51 ± 10 years), 23 NOBD patients (age, 48 ± 14 years), and 22 HVs (age, 44 ± 13 years). One-way multivariate analysis of covariance showed a statistically significant difference in VD among the three groups when combining the layers after controlling for scan quality (P < 0.001). The VD was lowest in the BU group and highest in the HV group in all layers. The FAZ area was also statistically significant different among the groups (P < 0.005), with the largest FAZ areas in BU patients and smallest FAZ areas in the HV group. However, no statistically significant difference was found for the acircularity index. Conclusions The parafoveal microvasculature is affected not only in BU patients but also in NOBD patients. Most deviations in the retinal microcirculation in Behҫet patients were found in the deeper layers of the retina by using the quantitative VD measurement.
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Affiliation(s)
- Lisette M Smid
- Rotterdam Ophthalmic Institute, Rotterdam, The Netherlands
| | | | | | - Jan A M van Laar
- Section of Clinical Immunology, Departments of Internal Medicine and Immunology, Erasmus Medical Center, Rotterdam, The Netherlands
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14
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Xu L, Zhuang Y, Zhang G, Ma Y, Yuan J, Tu C, Li M, Wang W, Zhang Y, Lu X, Li J, Liu X, Xue Z, Zhou M, Sun J, Bao J, Li M, Lu F, Wang H, Su J, Qu J. Design, methodology, and baseline of whole city-million scale children and adolescents myopia survey (CAMS) in Wenzhou, China. EYE AND VISION 2021; 8:31. [PMID: 34407890 PMCID: PMC8373605 DOI: 10.1186/s40662-021-00255-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 07/30/2021] [Indexed: 01/19/2023]
Abstract
Background Myopia is the most common visual impairment in children and adolescents worldwide. This study described an economical and effective population-based screening pipeline and performed the project of a million scale children and adolescents myopia survey (CAMS), which will shed light on the further study of myopia from the level of epidemiology and precision medicine. Methods We developed a novel population-based screening pattern, an intelligent screening process and internet-based information transmission and analysis system to carry out the survey consisting of school children in Wenzhou, China. The examination items include unaided distance visual acuity, presenting distance visual acuity, and non-cycloplegic autorefraction. Myopia and high myopia were defined as spherical equivalent (SE) ≤ − 1.00 diopters (D) and SE ≤ − 6.00 D, respectively. Next, the reports of the vision checking were automatically sent to parents and the related departments. The CAMS project will be done two to four times annually with the support of the government. An online eyesight status information management system (OESIMS) was developed to construct comprehensive and efficient electronic vision health records (EVHRs) for myopia information inquiry, risk pre-warning, and further study. Results The CAMS completed the first-round of screening within 30 days for 99.41% of Wenzhou students from districts and counties, in June 2019. A total of 1,060,925 participants were eligible for CAMS and 1,054,251 (99.37% participation rate) were selected through data quality control, which comprised 1305 schools, and 580,609, 251,050 and 170,967 elementary, middle, and high school students. The mean age of participants was 12.21 ± 3.32 years (6–20 years), the female-to-male ratio was 0.82. The prevalence of myopia in elementary, middle, and high school students was 38.16%, 77.52%, and 84.00%, respectively, and the high myopia incidence was 0.95%, 6.90%, and 12.98%. Conclusions The CAMS standardized myopia screening model involves automating large-scale information collection, data transmission, data analysis and early warning, thereby supporting myopia prevention and control. The entire survey reduced 90% of staff, cost, and time consumption compared with previous surveys. This will provide new insights for decision support for public health intervention. Supplementary Information The online version contains supplementary material available at 10.1186/s40662-021-00255-1.
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Affiliation(s)
- Liangde Xu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Youyuan Zhuang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Guosi Zhang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Yunlong Ma
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jian Yuan
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Changseng Tu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,National Clinical Research Center for Ocular Disease, Wenzhou, 325027, China
| | - MiaoMiao Li
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,National Clinical Research Center for Ocular Disease, Wenzhou, 325027, China
| | - Wencan Wang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Yaru Zhang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Xiaoyan Lu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jing Li
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, 150081, People's Republic of China
| | - Xinting Liu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China
| | - Zhengbo Xue
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China
| | - Meng Zhou
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jie Sun
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jinhua Bao
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China.,National Clinical Research Center for Ocular Disease, Wenzhou, 325027, China
| | - Ming Li
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China.,National Clinical Research Center for Ocular Disease, Wenzhou, 325027, China
| | - Fan Lu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China. .,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China. .,National Clinical Research Center for Ocular Disease, Wenzhou, 325027, China.
| | - Hong Wang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China. .,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China.
| | - Jianzhong Su
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China. .,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China. .,Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, 325027, China.
| | - Jia Qu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China. .,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, 325027, China. .,National Clinical Research Center for Ocular Disease, Wenzhou, 325027, China.
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15
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Fan Q, Wang H, Jiang Z. Axial length and its relationship to refractive error in Chinese university students. Cont Lens Anterior Eye 2021; 45:101470. [PMID: 34030907 DOI: 10.1016/j.clae.2021.101470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 04/04/2021] [Accepted: 05/12/2021] [Indexed: 12/17/2022]
Abstract
PURPOSE To investigate the relationship between axial length (AL) and refractive error (RE). METHODS Participants comprised Chinese university students. In total, 894 eyes with low hyperopia to emmetropia (-0.50D ≤ spherical equivalent (SE) ≤ +2.00D), and 1007 eyes with moderate to high myopia (-11.00D ≤ SE ≤ -4.00D) were analyzed. Cycloplegic RE and AL were measured with an autorefractor and IOL Master respectively. The association between AL and RE was evaluated by linear regression. Furthermore, differences in the mean AL, as well as the correlation between AL and ocular refraction, were evaluated according to SE, sex, and age. RESULTS In both the moderate to high myopia and low hyperopia to emmetropia groups, mean AL was significantly longer in men (26.48 mm, confidence interval (CI) 26.41-26.56 mm; 23.82 mm, CI: 23.76-23.88 mm, respectively) than in women (25.78 mm, CI: 25.71-25.86 mm; 23.25 mm, CI: 23.17-23.33 mm, respectively). For both men and women, mean AL significantly differed among four SE groups (+0.50D < SE ≤ +2.00D, -0.50D ≤ SE ≤ +0.50D, -4.00D ≤ SE ≤ -6.00D, SE < -6.00D, P < 0.001). The correlation coefficient between AL and ocular refraction was -0.318 and -0.277 in male and female participants, respectively, with low hyperopia to emmetropia (-0.50D ≤ SE ≤ +2.00D), and -0.545 and -0.437 in male and female participants, respectively, with moderate to high myopia (-11.00D ≤ SE ≤ -4.00D). There were no age-related effects on SE (P = 0.714) or AL (P = 0.952). CONCLUSIONS Ocular refraction is negatively correlated with AL in Chinese university students. The correlation coefficient is greater in those with moderate to high myopia than in those with low hyperopia to emmetropia. Furthermore, the AL is longer in men than in women.
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Affiliation(s)
- Qian Fan
- Tianjin Eye Hospital and Eye Institute, Tianjin Key Lab of Ophthalmology and Visual Science, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology Tianjin Medical University, Tianjin, China.
| | - Hongxia Wang
- Shanghai Guanghua Integrated Traditional Chinese and Western Medicine Hospital, Guanghua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200052, China.
| | - Zhixin Jiang
- Tianjin Eye Hospital and Eye Institute, Tianjin Key Lab of Ophthalmology and Visual Science, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology Tianjin Medical University, Tianjin, China
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16
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Swept Source Optical Coherence Tomography Analysis of the Selected Eye's Anterior Segment Parameters. J Clin Med 2021; 10:jcm10051094. [PMID: 33807917 PMCID: PMC7961440 DOI: 10.3390/jcm10051094] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The present study determined the mean reference values of the anterior segment parameters of the selected eye using swept source optical coherence tomography (SS-OCT) in healthy Caucasian participants. METHODS A total of 166 volunteers (age 54-79 years), women (n = 92) and men (n = 74), were analyzed. One eye of each subject was randomly selected for anterior segment imaging. The anterior segment of the eye was scanned with CASIA2. The analyzed anterior segment parameters were divided into three groups, namely parameters of the cornea, lens, and angle. RESULTS The OCT (e.g., Ks, Kf, pKf, pKs, and central corneal thickness) and Fourier parameters of the cornea were significantly different between females and males. The iridocorneal angle was the smallest in the upper quadrant for all distance from the apex of the angle (250, 500, and 750 µm). CONCLUSIONS Therefore, SS-OCT enables the analysis of parameters of the cornea, anterior chamber, lens, and iridocorneal angle, highlighting its clinical utility. Sex-specific differences in the analyzed parameters should be taken into account during the diagnosis of corneal diseases. The configuration of the filtration angle is an important marker during glaucoma diagnosis and drainage implant surgery. Measurements with CASIA 2is characterized by very good repeatability.
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17
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Xie X, Corradetti G, Song A, Pardeshi A, Sultan W, Lee JY, Yu F, Zhang L, Chen S, Chopra V, Sadda SR, Xu B, Huang AS. Age- and refraction-related changes in anterior segment anatomical structures measured by swept-source anterior segment OCT. PLoS One 2020; 15:e0240110. [PMID: 33095821 PMCID: PMC7584205 DOI: 10.1371/journal.pone.0240110] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 09/18/2020] [Indexed: 12/14/2022] Open
Abstract
PURPOSE To assess the effects of age and refractive status on anterior segment anatomical structures, including the ciliary body, using a new swept-source anterior segment optical coherence tomography (AS-OCT) device. METHODS This prospective observational study included 63 healthy volunteers (mean age: 44.2 years). Images of the anterior segment were obtained using a new swept-source AS-OCT (ANTERION, Heidelberg Engineering GmbH, Heidelberg, Germany) with tracking and image averaging from the right eye of all participants. Repeatability as well as inter- and intra-observer reliability of biometric measurements were evaluated. The impact of image tracking and averaging on ciliary muscle measurements was tested. Univariate and multivariable statistical models were developed to evaluate the relationship of age and refractive status on anterior segment biometric measurements. RESULTS For all test-retest repeatability and inter- and intra-observer reproducibility of swept-source AS-OCT measurements, high intraclass correlation (ICC) was noted (0.88-1.00). The nasal maximum ciliary muscle thickness (CMTMAX) and distance between scleral spur to the thickest point of the ciliary muscle (SSMAX) were larger than those on the temporal side (p<0.001 and p = 0.006, respectively). Nasal and temporal CMTMAX (p = 0.004 and p<0.001, respectively) and lens thickness (p<0.01) increased with age. Nasal and temporal SSMAX decreased with older age and increasing hyperopia (p = 0.01 and p<0.001, respectively). Image averaging resulted in improved ciliary muscle measurements (p = 0.008 to 0.02). Lens vault increased with older age and increased hyperopia (p<0.01). OCT measurements of the angle decreased with older age and increased hyperopia (p<0.001 to 0.03). Aqueous depth decreased with older age and increased hyperopia (p<0.01). Pupil diameter decreased with older age (p<0.01). CONCLUSIONS Repeatability and reproducibility of biometric measurements using the ANTERION AS-OCT were excellent. Image averaging improved the accuracy of ciliary muscle measurements. The device produced measurements of biometric parameters that described superficial and deep structures including the ciliary body and full lens thickness from a single image.
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Affiliation(s)
- Xiaobin Xie
- Eye Hospital of China Academy of Chinese Medical Sciences, Beijing, China
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
- * E-mail:
| | - Giulia Corradetti
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Abe Song
- Roski Eye Institute, Department of Ophthalmology, University of Southern California, Los Angeles, California, United States of America
| | - Anmol Pardeshi
- Roski Eye Institute, Department of Ophthalmology, University of Southern California, Los Angeles, California, United States of America
| | - William Sultan
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Jong Yeon Lee
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
- Department of Ophthalmology, College of Medicine, Gil Medical Center, Gachon University, Incheon, Korea
| | - Fei Yu
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Lixia Zhang
- Eye Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Shuang Chen
- Eye Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Vikas Chopra
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Srinivas R. Sadda
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
| | - Benjamin Xu
- Roski Eye Institute, Department of Ophthalmology, University of Southern California, Los Angeles, California, United States of America
| | - Alex S. Huang
- Doheny Eye Institute and Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, California, United States of America
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18
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Analysis of macular curvature in normal eyes using swept-source optical coherence tomography. Jpn J Ophthalmol 2020; 64:180-186. [DOI: 10.1007/s10384-020-00721-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 12/27/2019] [Indexed: 12/15/2022]
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