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Wang J, Baumgarten S, Balcewicz F, Johnen S, Walter P, Lohmann T. A workflow to visualize vertebrate eyes in 3D. PLoS One 2023; 18:e0290420. [PMID: 37607178 PMCID: PMC10443858 DOI: 10.1371/journal.pone.0290420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/07/2023] [Indexed: 08/24/2023] Open
Abstract
PURPOSE To establish a workflow to visualize the surgical anatomy in 3D based on histological data of eyes of experimental animals for improving the planning of complex surgical procedures. METHODS Four C57BL/6J wild-type(wt) mouse eyes, three Brown Norway rat eyes and four Chinchilla Bastard rabbit eyes were enucleated and processed for standard histology with serial sections and hematoxylin and eosin staining. Image stacks were processed to obtain a representation of the eye anatomy in 3D. In addition, virtual image stacks and 3D point clouds were generated by processing sagittal sections of eyes with stepwise 180° rotation and projection around the eye axis to construct a rotationally symmetric 3D model from one single sagittal section. RESULTS Serial sections of whole eyes of mice, rats and rabbits showed significant artifacts interfering with a practical image stack generation and straightforward 3D reconstruction despite the application of image registration techniques. A workflow was established to obtain a 3D image of the eye based on virtual image stacks and point cloud generation by rotation of a single sagittal section of the eye around the symmetry axis. By analyzing the tissue shrinkage during histological processing true biometric reconstructions of the eyes were feasible making the resulting model usable for 3D modeling and simulation, e.g. for planning of complex surgical procedures in different species. CONCLUSION Because serial sections of the eye with standard histological protocols yielded too many artifacts for a straightforward 3D visualization we reconstructed a pseudorealistic 3D model based on virtual image stacks and point cloud generation calculated from a single sagittal section of the eye. Such a model detailing microscopic structures of the whole eye will allow for a specific planning of surgical procedures in small animal eyes in order to prevent surgical complications in a very early stage of an experiment and it will support the design and development of complex intraocular implants. It will therefore be helpful in surgical teaching and improve laboratory animal welfare by an expected reduction of experimental animal numbers. Further processing including integration of mechanical tissue properties is needed to convert these 3D models into a practical virtual reality teaching and simulation platform for eyes of several species.
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Affiliation(s)
- Jiayun Wang
- Department of Ophthalmology, RWTH Aachen University, Aachen, Germany
| | - Sabine Baumgarten
- Department of Ophthalmology, RWTH Aachen University, Aachen, Germany
| | | | - Sandra Johnen
- Department of Ophthalmology, RWTH Aachen University, Aachen, Germany
| | - Peter Walter
- Department of Ophthalmology, RWTH Aachen University, Aachen, Germany
| | - Tibor Lohmann
- Department of Ophthalmology, RWTH Aachen University, Aachen, Germany
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Rozema JJ, Khan A, Atchison DA. Modelling ocular ageing in adults with well-controlled type I diabetes. ADVANCES IN OPHTHALMOLOGY PRACTICE AND RESEARCH 2022; 2:100048. [PMID: 37846385 PMCID: PMC10577873 DOI: 10.1016/j.aopr.2022.100048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/03/2022] [Accepted: 03/22/2022] [Indexed: 10/18/2023]
Abstract
Purpose To develop a paraxial eye model based on a previously collected cohort of adults with well-controlled type 1 diabetes mellitus (DM1) and a limited range of refractive errors. Methods The study used the previously published biometric data of 72 participants (Age: 41.5 ± 12.4 years) with DM1. Measurements included objective refraction, anterior and posterior corneal radii of curvatures, and internal distances. Moreover, phakometry was used to determine the lens radii of curvature and lens equivalent indices, from which the lens powers were calculated. A multivariate linear regression was performed for each biometric parameter with respect to current age (Age), the time since the onset of diabetes (Tdb), and current levels of glycated hemoglobin (HbA1c). The vitreous chamber depth was determined from other distances, and lens equivalent index was chosen to balance the models. These were compared with an existing model for non-diabetic eyes. Results Some dependent parameters were not affected by the independent variables (spherical equivalent, anterior corneal radius of curvature, central corneal thickness), some were affected by time since onset (the lens radii of curvatures, anterior chamber depth) and others were affected by both age and time since onset (posterior corneal radius of curvature, lens thickness, axial length). None of the dependent parameters were affected by current levels of HbA1c. Conclusions The proposed model accurately describes the age-related changes in the eyes of people with DM1. In this description the age of diabetes onset plays an important role, especially if the diabetes onset occurred during childhood.
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Affiliation(s)
- Jos J. Rozema
- Visual Optics Lab Antwerp (VOLANTIS), Faculty of Medicine and Health Sciences, Antwerp University, Wilrijk, Belgium
- Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium
| | - Adnan Khan
- Research Division, Weill Cornell Medicine – Qatar, Doha, Qatar
- Faculty of Health Sciences, Khyber Medical University, Peshawar, Pakistan
| | - David A. Atchison
- Centre for Vision and Eye Research, Queensland University of Technology, Kelvin Grove, Australia
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Liu CF, Chen SC, Chen KJ, Liu L, Chen YP, Kang EYC, Liu PK, Yeung L, Wu WC, Lai CC, Lo FS, Wang NK. Higher HbA1c may reduce axial length elongation in myopic children: a comparison cohort study. Acta Diabetol 2021; 58:779-786. [PMID: 33587176 PMCID: PMC8487071 DOI: 10.1007/s00592-020-01631-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/31/2020] [Indexed: 01/19/2023]
Abstract
AIMS To compare the annual axial length (AL) changes in myopic children with type 1 diabetes mellitus (T1DM) and those without diabetes. METHODS There are two groups of myopic children in this retrospective cohort study. Group 1 consisted of myopic children with T1DM (44 eyes of 22 patients). Group 2 comprised age-matched myopic children without diabetes (44 eyes of 22 children). These two groups were compared with regard to their baseline clinical characteristics. A generalized estimating equations (GEE) model was also used to determine the most likely factor that contributed to the results. RESULTS The average ages of group 1 and group 2 were 14.8 and 14.6 years, respectively. Children in group 1 had significantly slower annual AL changes (0.051 mm/year vs 0.103 mm/year; 50.5% slower, P = 0.011) and shorter baseline AL (23.97 vs 25.19 mm, P < 0.001) than those in group 2. GEE also showed that serum glycated hemoglobin (HbA1c) level (B = -0.023, P = 0.039) was the most important factor in reducing AL elongation in group 1 myopic children. CONCLUSIONS Long-term higher HbA1c level may reduce AL elongation. A strict blood sugar control strategy in clinical practice is warranted to axial myopia progression in T1DM children.
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Affiliation(s)
- Chun-Fu Liu
- Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan
- Program in Molecular Medicine, National Yang Ming University, Taipei, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shin-Chieh Chen
- Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Kuan-Jen Chen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Laura Liu
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Yen-Po Chen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
- Department of Ophthalmology, Tucheng Municipal Hospital, New Taipei City, Taiwan
| | - Eugene Yu-Chuan Kang
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Pei-Kang Liu
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA
| | - Ling Yeung
- Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Wei-Chi Wu
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chi-Chun Lai
- Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Fu-Sung Lo
- College of Medicine, Chang Gung University, Taoyuan, Taiwan.
- Division of Pediatric Endocrinology and Genetics, Chang Gung Memorial Hospital, Linkou, Taiwan.
| | - Nan-Kai Wang
- Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University, New York, New York, USA.
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Gomes FE, de Matos R, Ledbetter E. Phacoemulsification of bilateral cataracts in two pet rabbits. Open Vet J 2018; 8:125-130. [PMID: 29721442 PMCID: PMC5918121 DOI: 10.4314/ovj.v8i2.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 04/04/2018] [Indexed: 12/01/2022] Open
Abstract
Two 3 year-old, healthy, client-owned Lop rabbits presented with bilateral cataracts. After performing a physical examination, bloodwork, ocular ultrasonography and electroretinography, both animals were deemed good surgical candidates for phacoemulsification. Bilateral cataract surgery was performed and both rabbits regained vision in both eyes. Both animals developed post-operative ocular hypertension and one animal developed corneal ulcers immediately after surgery. Both surgical complications resolved with medical management. This case series describes phacoemulsification of bilateral cataracts in 2 companion rabbits and the use of an intraocular lens in 1 rabbit. Surgical treatment of cataracts can be considered as a treatment option whenever a healthy rabbit is visually impaired due to cataracts.
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Affiliation(s)
| | - Ricardo de Matos
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Eric Ledbetter
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
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Handa S, Chia A, Htoon HM, Lam PM, Yap F, Ling Y. Myopia in young patients with type 1 diabetes mellitus. Singapore Med J 2016; 56:450-4. [PMID: 26310273 DOI: 10.11622/smedj.2015122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
INTRODUCTION This study aimed to evaluate the proportion of young patients with type 1 diabetes mellitus (T1DM) who have myopia, as well as the risk factors associated with myopia in this group. METHODS In this cross-sectional study, patients aged < 21 years with T1DM for ≥ 1 year underwent a comprehensive eye examination. Presence of parental myopia, and average hours of near-work and outdoor activity were estimated using a questionnaire. Annualised glycosylated haemoglobin (HbA1c), defined as the mean of the last three HbA1c readings taken over the last year, was calculated. Multivariate analysis using genetic, environmental and diabetes-related factors was done to evaluate risk factors associated with myopia. RESULTS Of the 146 patients (mean age 12.5 ± 3.6 years) recruited, 66.4% were Chinese and 57.5% were female. Myopia (i.e. spherical equivalent [SE] of -0.50 D or worse) was present in 96 (65.8%) patients. The proportion of patients with myopia increased from 25.0% and 53.6% in those aged < 7.0 years and 7.0-9.9 years, respectively, to 59.2% and 78.4% in those aged 10.0-11.9 years and ≥ 12.0 years, respectively. Higher levels of SE were associated with lower parental myopia (p = 0.024) and higher annualised HbA1c (p = 0.011). CONCLUSION Compared to the background population, the proportion of myopia in young patients with T1DM was higher in those aged < 10 years but similar in the older age group. Myopia was associated with a history of parental myopia. Environmental risk factors and poor glycaemic control were not related to higher myopia risk.
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Affiliation(s)
- Swati Handa
- Department of Ophthalmology, KK Women's and Children's Hospital, Singapore
| | - Audrey Chia
- Department of Ophthalmology, KK Women's and Children's Hospital, Singapore ; Singapore National Eye Centre, Singapore
| | | | - Pin Min Lam
- Department of Ophthalmology, KK Women's and Children's Hospital, Singapore
| | - Fabian Yap
- Department of Ophthalmology, KK Women's and Children's Hospital, Singapore
| | - Yvonne Ling
- Department of Ophthalmology, KK Women's and Children's Hospital, Singapore ; Singapore National Eye Centre, Singapore
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Gilger BC, Abarca E, Salmon JH. Selection of Appropriate Animal Models in Ocular Research: Ocular Anatomy and Physiology of Common Animal Models. METHODS IN PHARMACOLOGY AND TOXICOLOGY 2013. [DOI: 10.1007/7653_2013_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Hsu YW, Yeh SM, Chen YY, Chen YC, Lin SL, Tseng JK. Protective effects of taurine against alloxan-induced diabetic cataracts and refraction changes in New Zealand White rabbits. Exp Eye Res 2012; 103:71-7. [PMID: 22940558 DOI: 10.1016/j.exer.2012.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 07/23/2012] [Accepted: 08/02/2012] [Indexed: 11/19/2022]
Abstract
The present study examined the protective effects of taurine on alloxan-induced diabetic cataracts and lens damage in male New Zealand White rabbits. The animals were randomly divided into three treatment groups: (1) normal control (vehicle administration); (2) diabetes (100 mg/kg alloxan administration); and (3) diabetes + taurine (1% [w/v] taurine dissolved in drinking water and alloxan administration). The results showed that alloxan-induced diabetes caused significant (p < 0.05) hyperglycemia, hyperopic refraction shifts, cataract formation and lens damage compared with the normal control group. In contrast, the administration of taurine for 24 weeks significantly ameliorated the alloxan-induced elevated levels of blood glucose, level of hyperopic refraction error shifts in the eyes and progression of diabetic cataract formation in the lens in rabbits. Moreover, histopathology showed that the taurine supplement reduced the incidence of lens lesions induced by hyperglycemia. Overall, the studies demonstrate that taurine exhibits potent protective effects against alloxan-induced diabetic cataracts and refraction changes in rabbits.
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Affiliation(s)
- Yu-Wen Hsu
- School of Optometry, Chung Shan Medical University, No. 110, Sec. 1, Jianguo N. Rd., Taichung City 402, Taiwan, ROC
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Breen A, Mc Redmond G, Dockery P, O'Brien T, Pandit A. Assessment of wound healing in the alloxan-induced diabetic rabbit ear model. J INVEST SURG 2009; 21:261-9. [PMID: 19160134 DOI: 10.1080/08941930802216807] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The enhancement of diabetic wound healing represents a major clinical challenge to researchers. The challenge faced is to identify a suitable animal model that best represents the human situation. However, the majority of diabetic wound healing models are in rodents and are hindered by rapid contraction and thus do not reflect epithelial cell migration, as seen in the human wound. The alloxan-induced diabetic rabbit model is a cheap, reproducible model and offers the advantage of providing a noncontractile avascular wound bed. This study aimed to compare the effects of acute hyperglycemia in the alloxan model to normal rabbit controls on wound healing, using methods of stereology. Alloxan was administered 7 days prior to surgery. Four full-thickness punch biopsy wounds were created on each ear (n = 4). Wounds were excised at 7 and 14 days and prepared for stereological analysis from Masson's trichrome-stained histological sections. It was noted that the alloxan-treated animals showed an increase in the number of inflammatory cells and fibroblasts at 14 days. In addition, it was noted that the length density of blood vessels was reduced in the alloxan-induced diabetic rabbits, representing a greater radial diffusion distance between vessels and a less efficient network for nutrient exchange. This is the first study to take a stereological approach to defining the effects of diabetes mellitus on wound healing in a noncontractile model.
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Affiliation(s)
- Ailish Breen
- National Centre for Biomedical Engineering Science and Department of Mechanical and Biomedical Engineering, National University of Ireland, Galway.
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Wiemer NGM, Dubbelman M, Ringens PJ, Polak BCP. Measuring the refractive properties of the diabetic eye during blurred vision and hyperglycaemia using aberrometry and Scheimpflug imaging. Acta Ophthalmol 2009; 87:176-82. [PMID: 18547279 DOI: 10.1111/j.1755-3768.2008.01212.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE This study aimed to measure the refraction and geometry in the diabetic eye during the presence and absence of hyperglycaemia and blurred vision, using aberrometry and Scheimpflug imaging. METHODS Aberrometry and Scheimpflug imaging were used to examine ocular refraction and higher-order aberrations, as well as the shape of the cornea and the lens, in 25 patients with diabetes mellitus. From these parameters, the equivalent refractive index of the lens was calculated. Using paired t-tests, comparisons were made between a first series of measurements (Visit 1) taken in the presence of blurred vision and hyperglycaemia (> 10.0 micromol/l), and a second series of measurements (Visit 2) taken under normal conditions. RESULTS The mean difference in blood glucose between Visits 1 and 2 was 5.9 mmol/l (standard deviation [SD] 3.1) (p < 0.0001). Both small hyperopic and myopic shifts of equivalent refractive error (ERE) were found in nine patients (mean absolute difference ERE: 0.38 D [SD 0.12]; p = 0.02). Furthermore, higher-order aberrations (root mean square [RMS] error) were slightly increased in four patients (mean difference RMS error: 0.07 microm [SD 0.02]; p = 0.04) at Visit 1, compared to Visit 2. No significant changes were observed in the shape of the cornea or lens in any of the patients. No significant correlations were found between changes in blood glucose levels and the measured parameters in diabetic eyes. CONCLUSIONS The present study suggests that subjective symptoms of blurred vision during hyperglycaemia are not necessarily caused by changes in the refractive properties of the diabetic eye.
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Affiliation(s)
- Nanouk G M Wiemer
- Department of Ophthalmology, VU University Medical Center, Amsterdam, The Netherlands.
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Wiemer NGM, Eekhoff EMW, Simsek S, Heine RJ, Ringens PJ, Polak BCP, Dubbelman M. Refractive properties of the healthy human eye during acute hyperglycemia. Graefes Arch Clin Exp Ophthalmol 2008; 246:993-8. [PMID: 18389272 PMCID: PMC2413123 DOI: 10.1007/s00417-008-0810-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Revised: 02/20/2008] [Accepted: 02/26/2008] [Indexed: 11/25/2022] Open
Abstract
Purpose To measure the refractive properties of the healthy human eye during acute hyperglycemia by means of Scheimpflug imaging and Hartmann-Shack aberrometry. Methods Acute hyperglycemia was induced in five healthy subjects (two males, three females, mean age ±SD 24.8 years ± 4.6) by means of an oral glucose tolerance test (OGTT) after subcutaneous somatostatin injection. Before and every 30 minutes after the OGTT, measurements with Scheimpflug imaging and Hartmann-Shack aberrometry were performed. The main outcome measures were the thickness and shape of the lens, and the ocular refractive error and higher order aberrations. The equivalent refractive index of the lens was calculated from these parameters. Measurements at baseline and during hyperglycemia were analyzed by means of Wilcoxon signed rank sum tests. Results During hyperglycemia (mean blood glucose level at baseline: 4.0 mmol/l; mean maximal blood glucose level: 18.4 mmol/l) no changes could be found in the refractive properties within the group. In one subject, a hyperopic shift (0.4 D) was observed, together with a more convex shape of the anterior lens surface and a decrease in the equivalent refractive index of the lens. Conclusions This study shows that hyperglycemia generally does not cause changes in the refractive properties of the healthy eye. Nevertheless, in one subject a hyperopic shift accompanied by a change in shape and refractive index of the lens was measured. This finding could provide an explanation for the mechanism underlying the refractive changes that are often observed during hyperglycemia.
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Affiliation(s)
- Nanouk G M Wiemer
- Department of Ophthalmology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands.
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Chen SJ, Tung TH, Liu JH, Lee AF, Lee FL, Hsu WM, Chou P. Prevalence and associated factors of refractive errors among type 2 diabetics in Kinmen, Taiwan. Ophthalmic Epidemiol 2008; 15:2-9. [PMID: 18300083 DOI: 10.1080/09286580701585736] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE A community-based study was conducted to identify the extent of prevalence of refractive errors and their associated factors from among the Chinese type 2 diabetic population in Kinmen. METHODS A total of 547 patients (> 40 years old) with type 2 diabetes were examined with a complete eye screening tests including objective autorefraction. Spherical equivalent refractions of right eyes were reported. Data collected include age, gender, general medical information and serum biochemistry. RESULTS The mean refraction was -0.83 +/- 2.49 D. Prevalence rates were determined for myopia (44.1%), hyperopia (24.1%), high myopia (13.0%), and astigmatism (87.8%). Age is an important factor for all of the refractive errors. After adjustment for age, male gender and > 3 grade nuclear opacity appeared to be statistically significant factors for myopia. For hyperopia, > or =7% HbA1c was a significant associated factor, and for astigmatism, > or =200 mg/dl total cholesterol was the risk factor. Multiple linear regression showed that every increase of one year of age and one percent of HbA1c is associated with 0.04 D (p = 0.003) and 0.13D (p = 0.04) shift in hyperopia, respectively. Nuclear opacity with grade 3-4 and grade 5-6 will shift toward myopia of -0.72D (p = 0.02) and -5.34D (p < 0.0001) after adjustment for other risk factors. CONCLUSIONS This study provides epidemiological data on refractive errors in a Chinese diabetic population in Kinmen, Taiwan. The myopia prevalence is higher than the reported rates in the general population. This survey further confirmed that myopia is more prevalent than hyperopia in the diabetic population. Age and blood sugar shift the refraction toward hyperopia while nuclear cataract reverses it. Correction of refractive errors in the diabetics remained a challenge as not only spectacles but medical intervention is mandatory.
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Affiliation(s)
- Shih-Jen Chen
- Community Medicine Research Center and Institute of Public Health, National Yang-Ming University, Taipei, Taiwan
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