Skip to main content

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

Publication ,  Journal Article
Wong, WL; Li, X; Li, J; Cheng, C-Y; Lamoureux, EL; Wang, JJ; Cheung, CY; Wong, TY
Published in: Invest Ophthalmol Vis Sci
January 9, 2013

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.

Duke Scholars

Published In

Invest Ophthalmol Vis Sci

DOI

EISSN

1552-5783

Publication Date

January 9, 2013

Volume

54

Issue

1

Start / End Page

280 / 287

Location

United States

Related Subject Headings

  • Photography
  • Ophthalmology & Optometry
  • Middle Aged
  • Lens, Crystalline
  • Humans
  • Diagnostic Techniques, Ophthalmological
  • Cataract
  • Algorithms
  • Aged, 80 and over
  • Aged
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Wong, W. L., Li, X., Li, J., Cheng, C.-Y., Lamoureux, E. L., Wang, J. J., … Wong, T. Y. (2013). Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system. Invest Ophthalmol Vis Sci, 54(1), 280–287. https://doi.org/10.1167/iovs.12-10657
Wong, Wan Ling, Xiang Li, Jialiang Li, Ching-Yu Cheng, Ecosse L. Lamoureux, Jie Jin Wang, Carol Y. Cheung, and Tien Yin Wong. “Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system.Invest Ophthalmol Vis Sci 54, no. 1 (January 9, 2013): 280–87. https://doi.org/10.1167/iovs.12-10657.
Wong WL, Li X, Li J, Cheng C-Y, Lamoureux EL, Wang JJ, et al. Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system. Invest Ophthalmol Vis Sci. 2013 Jan 9;54(1):280–7.
Wong, Wan Ling, et al. “Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system.Invest Ophthalmol Vis Sci, vol. 54, no. 1, Jan. 2013, pp. 280–87. Pubmed, doi:10.1167/iovs.12-10657.
Wong WL, Li X, Li J, Cheng C-Y, Lamoureux EL, Wang JJ, Cheung CY, Wong TY. Cataract conversion assessment using lens opacity classification system III and Wisconsin cataract grading system. Invest Ophthalmol Vis Sci. 2013 Jan 9;54(1):280–287.

Published In

Invest Ophthalmol Vis Sci

DOI

EISSN

1552-5783

Publication Date

January 9, 2013

Volume

54

Issue

1

Start / End Page

280 / 287

Location

United States

Related Subject Headings

  • Photography
  • Ophthalmology & Optometry
  • Middle Aged
  • Lens, Crystalline
  • Humans
  • Diagnostic Techniques, Ophthalmological
  • Cataract
  • Algorithms
  • Aged, 80 and over
  • Aged