NDLI: Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system.

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Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wong, Wan Ling Cheng, Ching-Yu Wang, Jie Jin Lamoureux, Ecosse L. Li, Xiang Li, Jialiang Cheung, Carol Y. Wong, Tien Yin
Description	Country affiliation: Singapore Author Affiliation: Wong WL ( Singapore Eye Research Institute, Singapore National Eye Centre, Singapore.)
Abstract	PURPOSE: To propose a general conversion approximation algorithm and illustrate its application to two cataract classification systems, the Lens Opacity Classification System III (LOCS III) and Wisconsin Cataract Grading System (Wisconsin system). METHODS: Lens opacity of 3265 participants (78.7% response rate) aged 40 to 80 years from the Singapore Malay Eye study were assessed both clinically during slit-lamp examination using LOCS III, and via slit-lamp and retro-illumination photographic grading using the Wisconsin system. Collapsed contingency tables were used to convert between the LOCS III and Wisconsin System. RESULTS: The conversion between the two cataract classification systems is affected by the direction of transformation. The conversion algorithm was validated and explained with an application example. CONCLUSIONS: An approximate conversion algorithm for any two cataract grading systems was proposed and applied to the LOCS III and Wisconsin system. These findings provide general ways to pool and compare cataract prevalence using different grading systems in epidemiological studies.
ISSN	01460404
e-ISSN	15525783
Journal	Investigative Opthalmology & Visual Science
Issue Number	1
Volume Number	54
Language	English
Publisher	Association for Research in Vision and Ophthalmology
Publisher Date	2013-01-09
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Algorithms Cataract Classification Diagnostic Techniques, Ophthalmological Lens, Crystalline Pathology Research Support, Non-u.s. Gov't Validation Studies Discipline Ophthalmology
Content Type	Text
Resource Type	Article
Subject	Ophthalmology Sensory Systems Cellular and Molecular Neuroscience

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