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Cheng Z, Meng J, Ye L, Wang X, Gong Y, Liu X. Changes in the Objective Vision Quality of Adolescents in a Mesopic Visual Environment After Wearing Orthokeratology Lenses: A Prospective Study. Eye Contact Lens 2024; 50:384-394. [PMID: 38968599 PMCID: PMC11335078 DOI: 10.1097/icl.0000000000001111] [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] [Accepted: 05/15/2024] [Indexed: 07/07/2024]
Abstract
PURPOSE This study aimed to investigate changes in objective vision quality in mesopic environments in teenagers with myopia after wearing orthokeratology (OK) lenses. METHODS This prospective clinical study included 45 patients (80 eyes) who received OK lenses at the First Affiliated Hospital of Jinan University from March 2021 to September 2021. An Optical Path Difference-Scan III refractive power/corneal analyzer was used to determine the corneal topographic parameters (corneal e, corneal Q, surface asymmetry index (SAI), and surface regularity index (SRI)), higher-order aberrations (HOAs), axial length (AL) change, lens decentration, induced astigmatism, target power, and Strehl ratio (SR) in a mesopic visual environment after wearing OK lenses for 6 months. In addition, corneal morphological parameters, HOAs, and SR were analyzed in a mesopic visual environment. Finally, we investigated the correlations among corneal morphology, HOAs, AL change, lens decentration, induced astigmatism, and SR. RESULTS The SAI value was significantly higher ( P <0.01), and the corneal e was significantly lower ( P <0.01), in a mesopic visual environment after wearing OK lenses for 1 week than baseline. A significant increase was observed in total HOAs and spherical aberrations, compared with before the OK lenses were worn ( P <0.01). In addition, SR in the mesopic visual environment decreased significantly after wearing the lenses ( P <0.01). No significant differences were observed ( P >0.05) among the 1-week, 1-month, 3-month, and 6-month follow-up findings. After 6 months, AL and lens decentration did not differ significantly compared with before ( P >0.05), whereas induced astigmatism significantly increased ( P <0.05). Negative correlations were observed between corneal Q, SAI, SRI, HOAs, induced astigmatism, and SR, and positive correlations were found between corneal e, AL change, lens decentration, and SR, after wearing OK lenses. KEY POINTS • Wearing orthokeratology lenses significantly altered corneal morphology and HOAs in myopic teenagers within 1 week. • The changes that we observed in the eyes of adolescents with myopia after wearing orthokeratology lenses decreased vision quality in mesopic environments. • Strehl ratio is significantly correlated with multiple parameters, including HOAs, AL change, and lens decentration. CONCLUSIONS In teenagers with myopia wearing OK lenses, significant changes in vision quality and corneal morphology were observed, leading to increased aberrations and affecting optical imaging quality. Furthermore, SR is significantly correlated with multiple parameters, including HOAs, AL change, and lens decentration. REGISTRATION NUMBER This study is registered with the United States Clinical Trials Registry under registration number NCT04929119.
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Affiliation(s)
- Zhi'ang Cheng
- Department of Ophthalmology (Z.C., J.M., L.Y., X.W., Y.G., X.L.), The First Affiliated Hospital of Jinan University, Guangzhou Guangdong, China; Department of Ophthalmology (L.Y.), Dongguan Tungwah Hospital, Dongguan Guangdong, China; and Department of Ophthalmology (J.M., X.L.), The Affiliated Shunde Hospital of Jinan University, Foshan Guangdong, China
| | - Jing Meng
- Department of Ophthalmology (Z.C., J.M., L.Y., X.W., Y.G., X.L.), The First Affiliated Hospital of Jinan University, Guangzhou Guangdong, China; Department of Ophthalmology (L.Y.), Dongguan Tungwah Hospital, Dongguan Guangdong, China; and Department of Ophthalmology (J.M., X.L.), The Affiliated Shunde Hospital of Jinan University, Foshan Guangdong, China
| | - Linyu Ye
- Department of Ophthalmology (Z.C., J.M., L.Y., X.W., Y.G., X.L.), The First Affiliated Hospital of Jinan University, Guangzhou Guangdong, China; Department of Ophthalmology (L.Y.), Dongguan Tungwah Hospital, Dongguan Guangdong, China; and Department of Ophthalmology (J.M., X.L.), The Affiliated Shunde Hospital of Jinan University, Foshan Guangdong, China
| | - Xinyu Wang
- Department of Ophthalmology (Z.C., J.M., L.Y., X.W., Y.G., X.L.), The First Affiliated Hospital of Jinan University, Guangzhou Guangdong, China; Department of Ophthalmology (L.Y.), Dongguan Tungwah Hospital, Dongguan Guangdong, China; and Department of Ophthalmology (J.M., X.L.), The Affiliated Shunde Hospital of Jinan University, Foshan Guangdong, China
| | - Yiqiang Gong
- Department of Ophthalmology (Z.C., J.M., L.Y., X.W., Y.G., X.L.), The First Affiliated Hospital of Jinan University, Guangzhou Guangdong, China; Department of Ophthalmology (L.Y.), Dongguan Tungwah Hospital, Dongguan Guangdong, China; and Department of Ophthalmology (J.M., X.L.), The Affiliated Shunde Hospital of Jinan University, Foshan Guangdong, China
| | - Xiaoyong Liu
- Department of Ophthalmology (Z.C., J.M., L.Y., X.W., Y.G., X.L.), The First Affiliated Hospital of Jinan University, Guangzhou Guangdong, China; Department of Ophthalmology (L.Y.), Dongguan Tungwah Hospital, Dongguan Guangdong, China; and Department of Ophthalmology (J.M., X.L.), The Affiliated Shunde Hospital of Jinan University, Foshan Guangdong, China
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Yue X, Yang Y, Chen S, Dai H. Statistical optimal parameters obtained by using clinical human ocular aberrations for high-precision aberration measurement. Int Ophthalmol 2024; 44:292. [PMID: 38940969 DOI: 10.1007/s10792-024-03176-9] [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: 06/13/2023] [Accepted: 06/15/2024] [Indexed: 06/29/2024]
Abstract
PURPOSE Compared to Shack-Hartmann wavefront sensor (SHWS), the parameters of virtual SHWS (vSHWS) can be easily adjusted to obtain the optimal performance of aberration measurement. Its current optimal parameters are obtained with only a set of statistical aberrations and not statistically significant. Whether the above parameters are consistent with the statistical results of the optimal parameters corresponding to each set of aberrations, and which performance is better if not? The purpose of this study was to answer these questions. METHODS The optimal parameters to reconstruct 624 sets of clinical ocular aberrations in the highest accuracy, including the numbers of sub-apertures (NSAs) and the expansion ratios (ERs) of electric field zero-padding, were determined sequentially in this work. By using wavefront-reconstruction accuracy as an evaluation index, the statistical optimal parameter configuration was selected from some possible configurations determined by the optimal NSAs and ERs. RESULTS The statistical optimal parameters are consistent for normal and abnormal eyes. They are different from the optimal parameters obtained with a set of statistical aberrations from the same 624 sets of aberrations, and the performance using the former is better than that using the latter. The performance using a fixed set of statistical optimal parameters is even close to that using the respective optimal parameters corresponding to each set of aberrations. CONCLUSION The vSHWS configured with a fixed set of statistical optimal parameters can be used for high-precision aberration measurement of both normal and abnormal eyes. The statistical optimal parameters are more suitable for vSHWS than the parameters obtained with a set of statistical aberrations. These conclusions are significant for the designs of vSHWS and also SHWS.
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Affiliation(s)
- Xian Yue
- Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China
- Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu, 610209, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yaliang Yang
- Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China.
- Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu, 610209, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Shen Chen
- Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China
- Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu, 610209, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hao Dai
- Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China
- Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu, 610209, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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Molina R, Redondo B, Ortiz C, Vera J, Díaz JA, Jiménez R. Higher order aberrations according to spherical, and astigmatic refractive errors in children. Clin Exp Optom 2024:1-12. [PMID: 38561016 DOI: 10.1080/08164622.2024.2325632] [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: 07/06/2022] [Accepted: 02/04/2024] [Indexed: 04/04/2024] Open
Abstract
CLINICAL RELEVANCE The results of this study present novel insights into the impact of spherical and astigmatic refractive errors on overall, corneal and internal aberrations and may provide a clear understanding of the emmetropisation process and the development of visual function. BACKGROUND This study aimed to assess the association between overall, corneal and internal higher-order aberrations and the spherical and astigmatic components (magnitude and angle) of refractive error in a large sample of children. METHODS A total of 311 children aged 7 - 8 years old were classified based on spherical equivalent refraction (myopic, emmetropic and hyperopic); magnitude of astigmatism (none, low and moderate); and angle of astigmatism (with-the-rule, against-the-rule and oblique). Refractive error and overall, corneal and internal higher-order aberrations were measured using the OPD-Scan III workstation. RESULTS Regarding spherical equivalent refraction, myopic eyes had greater root mean square (RMS) overall higher-order values, total spherical, tetrafoil and secondary astigmatism aberrations, and internal higher-order, total spherical and tetrafoil aberrations in comparison to emmetropic eyes. The magnitude of astigmatism was positively associated with all overall RMS aberrations and with internal higher order, coma, total coma, total spherical and tetrafoil aberrations. Eyes with with-the-rule astigmatism showed higher RMS values of coma and total coma compared to eyes with against-the-rule and oblique astigmatism. CONCLUSIONS Higher-order aberrations are dependent on the spherical as well as astigmatic components of refractive error. These findings enhance the current understanding of the emmetropisation process and visual function development.
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Affiliation(s)
- Rubén Molina
- Department of Optics, University of Granada, Granada, Spain
| | - Beatriz Redondo
- Department of Optics, University of Granada, Granada, Spain
- New England College of Optometry, Boston, Massachusetts
| | - Carolina Ortiz
- Department of Optics, University of Granada, Granada, Spain
| | - Jesús Vera
- Department of Optics, University of Granada, Granada, Spain
- New England College of Optometry, Boston, Massachusetts
| | - José A Díaz
- Department of Optics, University of Granada, Granada, Spain
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Hahn IK, Lee D, Lee DH, Lee H, Tchah H, Kim JY. Serially Checked Spherical Aberration Can Evaluate the Anti-Myopia Effect of Orthokeratology Lens in Children. J Pers Med 2022; 12:jpm12101686. [PMID: 36294825 PMCID: PMC9604799 DOI: 10.3390/jpm12101686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 11/04/2022] Open
Abstract
We aimed to investigate the changes in higher-order aberrations (HOAs) after wearing orthokeratology (OK) lenses in myopic patients. The study included 15 eyes from ten myopic patients, whose refractive error was myopia less than -4.5 diopters (D) and astigmatism less than 1.5 D. Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA) were measured, and Zywave® aberrometry was performed at baseline and 1, 3, and 6 months following OK lens wear. The mean age was 11.5 years (range: 9-15 years). There was a significant improvement in UCVA (p ≤ 0.001) and a decrease in the spherical equivalent measured with auto-refraction at 6 months (p ≤ 0.001). Total HOAs significantly increased after OK lens wear (p ≤ 0.001), with spherical aberration increasing approximately 3.9-fold (p = 0.05). Spherical aberration demonstrated statistically significant positive correlations with the change in spherical equivalent at 3 and 6 months (p = 0.007 and 0.003, respectively). After wearing properly prescribed OK lens, all subjects had significantly improved UCVA and decreased myopic spherical equivalent, with increased total HOAs and positive spherical aberration at 1 month, and the changes were maintained at 6 months. Serially checked spherical aberration could evaluate the anti-myopia effect of the orthokeratology lens in children.
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Affiliation(s)
- In-Kyun Hahn
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro 43-Gil, Songpa-gu, Seoul 05505, Korea
| | - Donghan Lee
- University of Ulsan College of Medicine, 88, Olympic-Ro 43-Gil, Songpa-gu, Seoul 05505, Korea
| | - Dong-Ho Lee
- Bitsarang Eye Clinic, Prince Building, 492, Nohae-ro, Nowon-gu, Seoul 01751, Korea
| | - Hun Lee
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro 43-Gil, Songpa-gu, Seoul 05505, Korea
| | - Hungwon Tchah
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro 43-Gil, Songpa-gu, Seoul 05505, Korea
| | - Jae-Yong Kim
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro 43-Gil, Songpa-gu, Seoul 05505, Korea
- Correspondence: ; Tel.: +82-2-3010-3680; Fax: +82-2-470-6440
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Dai C, Liu M, Lv X, Li B. Subtle changes of the crystalline lens after cycloplegia: a retrospective study. BMC Ophthalmol 2021; 21:124. [PMID: 33676428 PMCID: PMC7937324 DOI: 10.1186/s12886-021-01884-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/25/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The purpose of this study was to evaluate the shape of the crystalline lens in terms of biometry and diopters before and after cycloplegia using the CASIA2 swept-source (SS) optical coherence tomography (OCT) system on the anterior segment. METHODS This was a retrospective study. Children and adolescents (26 males and 29 females, aged 4-21 years) with simple ametropia were selected for optometry and CASIA2 imaging at 2 separate visits before and after cycloplegia. Diopter values were derived from the spherical power (S) obtained by optometry. Biometric parameters of the crystalline lens, including the anterior chamber depth (ACD), anterior and posterior curvature of the lens (ACL and PCL), lens thickness (LTH), lens decentration (LD), lens tilt (LT), and equivalent diameter of the lens (LED), were measured by the CASIA2 system. The differences in these parameters after compared with before cycloplegia were determined, and their relationships were analyzed. RESULTS Fifty-five participants (106 eyes) were initially enrolled. There was a significant difference (P < 0.05) in the S (t=-7.026, P < 0.001), ACD (t=-8.796, P < 0.001), ACL (t=-13.263, P < 0.001) and LTH (t = 7.363, P < 0.001) after compared with before cycloplegia. The change in the PCL (t = 1.557, P = 0.122), LD (t = 0.876, P = 0.383), LT (t = 0.440, P = 0.661) and LED (t=-0.351, P = 0.726) was not statistically significant (P > 0.05). There was a significant (P < 0.05) correlation of the change in the S with that in the ACL (r = 0.466, P < 0.001), LTH (r=-0.592, P < 0.001), and LED (r = 0.223, P = 0.021) but not the PCL (r = 0.19, P = 0.051), LD (r=-0.048, P = 0.0628) or LT (r=-0.022, P = 0.822). Furthermore, the change in the ACD was closely related to the change in crystalline morphology. However, in children and adolescents, we found that the change in crystalline morphology was unrelated to age. CONCLUSIONS Changes in lens morphology after compared with before cycloplegia are mainly related to the ACL and LTH, but there is no difference in the PCL, LD, LT, or LED. In the adolescent population, change in the S is related to change in the ACL, LED and LTH. However, age is unrelated to the shape and tendency of the crystalline lens. Further research is required to determine whether the same conclusion applies to different age groups and different refractive states (myopia, hyperopia, emmetropia) .
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Affiliation(s)
- Cheng Dai
- School of Basic Medicine, North Sichuan Medical College, Sichuan Province, 637000, Nanchong, China.,Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Sichuan Province, 637000, Nanchong, China
| | - Meng Liu
- School of Basic Medicine, North Sichuan Medical College, Sichuan Province, 637000, Nanchong, China
| | - Xiaodong Lv
- Department of Clinical Medicine, North Sichuan Medical College, Sichuan Province, 637000, Nanchong, China
| | - Binzhong Li
- School of Basic Medicine, North Sichuan Medical College, Sichuan Province, 637000, Nanchong, China.
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Hoshing A, Samant M, Bhosale S, Naik AM. Comparison of higher order aberrations in amblyopic and non-amblyopic eyes in pediatric patients with anisometropic amblyopia. Indian J Ophthalmol 2019; 67:1025-1029. [PMID: 31238401 PMCID: PMC6611289 DOI: 10.4103/ijo.ijo_1625_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 03/05/2019] [Indexed: 12/01/2022] Open
Abstract
Purpose To compare the ocular higher order aberrations (HOAs) for the physiologic pupil size in amblyopic and non-amblyopic eyes of patients with anisometropic amblyopia in pediatric age group. Methods Children between 5 and 15 years age having treatment naïve anisometropic amblyopia; after a detailed examination by a pediatric ophthalmologist; underwent assessment of wavefront aberrations for both amblyopic and non-amblyopic eyes at their physiologic pupil sizes using i-Trace ray tracing wavefront aberrometer. The axial lengths were also measured using IOL Master 500. The RMS values of the total ocular higher order aberrations (HOAs) and those arising from internal and corneal components of the two eyes were tabulated and compared to look for differences. Comparison of total ocular aberrations for pre-determined refractive error groups was also done for amblyopic and non-amblyopic eyes separately. Results Eighty-eight eyes of 44 subjects were included for analysis. Mean pupil size was comparable in between amblyopic and non-amblyopic eyes (3.98 mm vs. 4.07 mm, P = 0.346). The mean axial lengths of the two eyes were comparable (amblyopic eyes 23.13 mm vs. non-amblyopic eyes 22.88 mm, P = 0.419). Significant differences in total HOAs and those arising from the internal optics (except spherical aberrations) of the eye were noted between the two eyes. There were no differences in the corneal HOAs. The total HOAs were comparable amongst the various refractive error groups for amblyopic and non-amblyopic eyes individually. Conclusion There are significant differences in ocular HOAs between amblyopic and non-amblyopic eyes in children with anisometropic amblyopia.
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Affiliation(s)
- Abhishek Hoshing
- Department of Pediatric Ophthalmology and Strabismus, Laxmi Eye Institute, Uran Road, Panvel, Maharashtra, India
| | - Monica Samant
- Department of Pediatric Ophthalmology and Strabismus, Laxmi Eye Institute, Uran Road, Panvel, Maharashtra, India
| | - Seema Bhosale
- Department of Pediatric Ophthalmology and Strabismus, Laxmi Eye Institute, Uran Road, Panvel, Maharashtra, India
| | - Anaya M Naik
- Department of Pediatric Ophthalmology and Strabismus, Laxmi Eye Institute, Uran Road, Panvel, Maharashtra, India
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Frisina R, Parrozzani R, Tozzi L, Pilotto E, Midena E. Pupil cerclage technique for treatment of traumatic mydriasis. Eur J Ophthalmol 2019; 30:480-486. [PMID: 30957517 DOI: 10.1177/1120672119839304] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
AIM The aim of this study is to evaluate the efficacy of pupil cerclage and a new variant of sliding knot technique for repairing traumatic mydriasis. DESIGN This is a observational case series study. SETTING/METHODS A series of consecutive patients affected by traumatic permanent mydriasis who underwent pupil cerclage were recruited at the Department of Ophthalmology of the University of Padova, Italy. Best-corrected visual acuity, measured in logarithm of minimum angle of resolution (logMAR), and intraocular pressure at 1, 3, 6, and 12 months were monitored. Postoperative pupil size and anterior chamber angle were measured. Postoperative cystoid macular edema (CME) and glaucoma were evaluated. RESULTS Twelve patients were recruited. Phakic patients (7) underwent cataract surgery combined with pupil cerclage. Vitrectomy was performed in nine patients. Best-corrected visual acuity improved from 2.9 ± 1.1 logMAR at baseline to 0.3 ± 0.8 logMAR at 12th month. No significant difference between the preoperative and postoperative intraocular pressure was demonstrated. Mean pupil size at 12th month was 2.82 ± 0.5 mm with round shape. Anterior chamber angle mean was 47° ± 4.5°. Six patients developed a CME, and two patients a glaucoma. CONCLUSION Pupil cerclage technique reestablishes the pupil with a precise regulation of the pupil size without distortion of its natural round shape. New sliding knot allows surgeon to reduce the risk of iatrogenic iris damage and to make a security permanent knot.
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Affiliation(s)
- Rino Frisina
- Department of Ophthalmology, University of Padova, Padova, Italy
| | | | - Luigi Tozzi
- Department of Ophthalmology, University of Padova, Padova, Italy
| | | | - Edoardo Midena
- Department of Ophthalmology, University of Padova, Padova, Italy
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Zhao J, Qiu Y, Tian CL, Fan TJ. The cytotoxic and pro-apoptotic effects of phenylephrine on corneal stromal cells via a mitochondrion-dependent pathway both in vitro and in vivo. ACTA ACUST UNITED AC 2016; 68:409-17. [DOI: 10.1016/j.etp.2016.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/09/2016] [Indexed: 12/13/2022]
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Cho AR, Kang NH, Jun RM. Relationship between Dry Eye Parameters and Anterior Corneal Higher-Order Aberrations Measured by Two Different Instruments. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2015. [DOI: 10.3341/jkos.2015.56.1.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Ah Ran Cho
- Department of Ophthalmology, Ewha Womans University School of Medicine, Seoul, Korea
| | - Na Hee Kang
- Department of Ophthalmology, Ewha Womans University School of Medicine, Seoul, Korea
| | - Roo Min Jun
- Department of Ophthalmology, Ewha Womans University School of Medicine, Seoul, Korea
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Oltulu R, Satirtav G, Kerimoğlu H, Zengin N, Ozkağnici A, Okka M. Influence of cyclopentolate hydrochloride on corneal biomechanical properties in healthy individuals. Eye Contact Lens 2014; 40:309-11. [PMID: 25083778 DOI: 10.1097/icl.0000000000000058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE This observational study aims to investigate the effects of cyclopentolate hydrochloride (1%) on corneal biomechanical properties, with the ocular response analyzer (ORA), in healthy individuals. METHODS Corneal hysteresis (CH), corneal resistance factor (CRF), Goldmann-correlated intraocular pressure (IOPg), and corneal-compensated intraocular pressure (IOPcc) measurements of 36 (15 female and 21 male) healthy individuals, before and after 45 min of 1% cyclopentolate hydrochloride instillation, were performed by the ORA. RESULTS The mean CH and IOPcc measurements of the eyes were 10.63±1.17 mm Hg and 15.15±2.69 mm Hg, precycloplegia, and 11.09±1.32 mm Hg and 14.16±2.77 mm Hg, postcycloplegia, respectively. The differences between the precycloplegia and postcycloplegia in both measurements were statistically significant (P=0.031, P=0.016, respectively; paired t test). The mean CRF and mean IOPg measurements of the eyes were 10.40±1.16 mm Hg and 14.83±2.56 mm Hg, precycloplegia, and 10.61±1.33 mm Hg and 14.25±2.65 mm Hg, postcycloplegia, respectively. The differences between the precycloplegia and postcycloplegia measurements of the eyes were insignificant (P=0.264 and P=0.100, respectively; paired t test). CONCLUSIONS A 1% cyclopentolate hydrochloride instillation leads to significant changes in the CH values and IOPcc measurements. This should be taken into account during the evaluation of refractive surgery candidates and in clinical conditions where ORA measurements are considered in the diagnosis and follow-up.
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Affiliation(s)
- Refik Oltulu
- Department of Ophthalmology, Necmettin Erbakan University School of Medicine, Konya, Turkey
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Lin HZ, Chen CC, Lee YC. Effect of pharmacologic pupil dilation with tropicamide and phenylephrine on wavefront measurements. Taiwan J Ophthalmol 2013. [DOI: 10.1016/j.tjo.2013.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Rasp M, Hohensinn M, Riha W, Seyeddain O, Grabner G, Dexl AK. Vergleich der visuellen Performance des asphärischen und sphärischen Typs des gleichen faltbaren Intraokularlinsen-designs aus hydrophilem Acrylat. SPEKTRUM DER AUGENHEILKUNDE 2011. [DOI: 10.1007/s00717-011-0034-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Palamar M, Egrilmez S, Uretmen O, Yagci A, Kose S. Influences of cyclopentolate hydrochloride on anterior segment parameters with Pentacam in children. Acta Ophthalmol 2011; 89:e461-5. [PMID: 21332970 DOI: 10.1111/j.1755-3768.2011.02122.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To investigate the effects of cyclopentolate hydrochloride 1% on the main numerical parameters of anterior segment with Pentacam rotating Scheimpflug camera in children. SETTING Ege University Faculty of Medicine, Department of Ophthalmology. METHODS Pentacam measurements of 50 (23 boys and 27 girls) children before and after 45 min of cyclopentolate hydrochloride 1% instillation were performed and compared with 31 (17 boys and 14 girls) no medication instilled control group. Measurements of the control group (cycloplegia-free) were taken at two separate sessions with 45-min intervals. For comparison of the test parameters, paired t-test in the groups and unpaired t-test in between the groups were used. RESULTS Mean ages in the study and control groups were 10.06 ± 2.87 (range 6 and 16 years) and 9.87 ± 2.72 (range 6 and 16 years), respectively, and the difference was statistically insignificant (p > 0.05). In the study group, measurements between two sessions were significantly different for the parameters of anterior chamber depth (ACD), anterior chamber volume (ACV) and central corneal thickness (CCT) (p < 0.05), whereas none of the parameters was different between two sessions for control group. CONCLUSIONS Cyclopentolate hydrochloride 1% instillation leads to significant decrement in CCT. ACD and ACV are the other important refractive parameters that increase significantly after cycloplegia. Effects of cycloplegia on these parameters for Pentacam measurements should be regarded for proper clinical interpretation in children.
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Affiliation(s)
- Melis Palamar
- Faculty of Medicine, Department of Ophthalmology, Ege University, Izmir, Turkey.
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