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Sabanayagam C, Yip W, Gupta P, Mohd Abdul RBB, Lamoureux E, Kumari N, Cheung GCM, Cheung CY, Wang JJ, Cheng CY, Wong TY. Singapore Indian Eye Study-2: methodology and impact of migration on systemic and eye outcomes. Clin Exp Ophthalmol 2017; 45:779-789. [DOI: 10.1111/ceo.12974] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 04/13/2017] [Accepted: 04/19/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Charumathi Sabanayagam
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
- Centre for Quantitative Medicine; Duke-NUS Medical School; Singapore
| | - Wanfen Yip
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
| | - Preeti Gupta
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
| | | | - Ecosse Lamoureux
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program; Duke-NUS Medical School; Singapore
| | - Neelam Kumari
- Department of Ophthalmology and Visual Sciences; Khoo Teck Puat Hospital; Hong Kong
| | - Gemmy CM Cheung
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program; Duke-NUS Medical School; Singapore
| | - Carol Y Cheung
- Department of Ophthalmology and Visual Sciences; Chinese University of Hong Kong Eye Centre; Hong Kong
| | - Jie Jin Wang
- Centre for Vision Research; University of Sydney; New South Wales Australia
| | - Ching-Yu Cheng
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program; Duke-NUS Medical School; Singapore
| | - Tien Yin Wong
- Singapore Eye Research Institute; Singapore National Eye Centre; Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program; Duke-NUS Medical School; Singapore
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Yu JM, Yang DQ, Wang H, Xu J, Gao Q, Hu LW, Wang F, Wang Y, Yan QC, Zhang JS, Liu Y. Prevalence and risk factors of lens opacities in rural populations living at two different altitudes in China. Int J Ophthalmol 2016; 9:610-6. [PMID: 27162738 DOI: 10.18240/ijo.2016.04.23] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/31/2015] [Indexed: 12/15/2022] Open
Abstract
AIM To investigate the prevalence of and risk factors for lens opacities in populations living at two different altitudes in China. METHODS A total of 813 subjects aged ≥40y in Lhasa (Tibet Autonomous Region, China. Altitude: 3658 m) and Shaoxing (Zhejiang Province, China. Altitude: 15 m) were underwent eye examinations and interviewed in this cross-sectional study. Participants' lens opacities were graded according to the Lens Opacities Classification System II (LOCS II) and the types of opacities with LOCS II scores ≥2 were determined. Univariate and stepwise logistic regression were used to evaluate the associations of independent risk factors with lens opacities. RESULTS Lens opacities were significantly more prevalent in the high-altitude than in the low-altitude area (χ (2)=10.54, P<0.001). Lens opacities appear to develop earlier in people living at high than at low altitude. The main types of lens opacity in Lhasa and Shaoxing were mixed (23.81%) and cortical (17.87%), respectively. Independent risk factors associated with all lens opacities were age, ultraviolet (UV) radiation exposure, and educational level. Compared with participants aged 40-49y, the risk of lens opacities increased gradually from 2 to 85 times per 10y [odds ratio (OR)=2.168-84.731, P<0.05). The risk of lens opacities was about two times greater in participants with the highest UV exposure than in those with the lowest exposure (OR=2.606, P=0.001). Educational level was inversely associated with lens opacities; literacy deceased the risk by about 25% compared with illiteracy (OR=0.758, P=0.041). CONCLUSION Old age, higher UV exposure and lower educational level are important risk factors for the development of lens opacities. Lens opacities are more prevalent among high-altitude than low-altitude inhabitants.
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Affiliation(s)
- Jia-Ming Yu
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - De-Qi Yang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Han Wang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Jun Xu
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Qian Gao
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110122, Liaoning Province, China
| | - Li-Wen Hu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110122, Liaoning Province, China
| | - Fang Wang
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110122, Liaoning Province, China
| | - Yang Wang
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110122, Liaoning Province, China
| | - Qi-Chang Yan
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Jin-Song Zhang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Yang Liu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110122, Liaoning Province, China
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Chua J, Cheng CY. Visually significant cataract: a global challenge. Clin Exp Ophthalmol 2016; 44:85-6. [PMID: 26995393 DOI: 10.1111/ceo.12717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jacqueline Chua
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore.,Duke-NUS Graduate Medical School, Singapore
| | - Ching-Yu Cheng
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore.,Duke-NUS Graduate Medical School, Singapore.,Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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