Please use this identifier to cite or link to this item:
Title: The impact of cataract, cataract types, and cataract grades on vision-specific functioning using rasch analysis
Authors: Chew, M.
Chiang, P.P.-C.
Zheng, Y.
Lavanya, R.
Wu, R.
Saw, S.M. 
Wong, T.Y. 
Lamoureux, E.L.
Issue Date: Jul-2012
Citation: Chew, M., Chiang, P.P.-C., Zheng, Y., Lavanya, R., Wu, R., Saw, S.M., Wong, T.Y., Lamoureux, E.L. (2012-07). The impact of cataract, cataract types, and cataract grades on vision-specific functioning using rasch analysis. American Journal of Ophthalmology 154 (1) : 29-38. ScholarBank@NUS Repository.
Abstract: • PURPOSE: To determine the impact of cataracts and their types and grades on vision-specific functioning. • DESIGN: Prospective population-based cross-sectional study. • METHODS: The Singapore Indian Eye Study examined 3400 of 4497 (75.6% response rate) ethnic Indians 40 years of age and older living in Singapore. Three thousand one hundred sixty-eight (93.2%) fulfilled inclusion criteria with complete information for final analysis. Cataracts were assessed on slit-lamp examination and were graded according to the Lens Opacity Classification System III. Vision-specific functioning scores were explored with the Visual Function scale, validated using Rasch analysis. • RESULTS: Two hundred sixty-nine (8.5%) and 740 (23.4%) of the study participants had unilateral and bilateral cataracts, respectively, and 329 (10.4%), 800 (25.2%), and 128 (4.1%) participants had nuclear, cortical, and posterior subcapsular (PSC) cataracts, respectively. In multivariate linear regression models, the presence of bilateral rather than unilateral cataract (β = -0.12; 95% confidence interval, -0.20 to 0.00) was associated independently with poorer vision-specific functioning, even after adjusting for undercorrected refractive error (β = -0.11; 95% confidence interval, -0.21 to 0.00). Bilateral nuclear, cortical, and PSC cataracts also were associated with poorer vision-specific functioning (β = -0.31, -0.15, and -1.15, respectively), with combinations of them having even greater impact. Significantly poorer vision-specific functioning occurred at Lens Opacity Classification System grades 4 (nuclear opalescence), 5 (nuclear color), 3 (cortical), and 1 (PSC) or higher. • CONCLUSIONS: People with bilateral but not unilateral cataracts experience difficulty with performing vision-specific daily activities independent of refractive error, with PSC cataracts and cataract combinations having the greatest impact. Cataract types cause poorer vision-specific functioning beginning at different severity grades. © 2012 Elsevier Inc. All rights reserved.
Source Title: American Journal of Ophthalmology
ISSN: 00029394
DOI: 10.1016/j.ajo.2012.01.033
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 26, 2019


checked on Mar 26, 2019

Page view(s)

checked on Mar 15, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.