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Cataract progression in India

M Srinivasan1, R Rahmathullah, C R Blair

  • 1Aravind Eye Hospital, Madurai, India.

The British Journal of Ophthalmology
|March 5, 1998
PubMed
Summary
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The Lens Opacities Classification System III (LOCS III) scale is feasible for field use in assessing cataract progression. High reliability was found, with 54% of subjects showing significant lens changes within one year.

Area of Science:

  • Ophthalmology
  • Public Health

Background:

  • Cataract is a leading cause of visual impairment globally.
  • Assessing cataract progression in diverse populations is crucial for intervention studies.

Purpose of the Study:

  • To evaluate the feasibility of the Lens Opacities Classification System III (LOCS III) for field use.
  • To determine the rate of cataract progression over one year in an Indian population.

Main Methods:

  • 150 subjects (33-55 years) in Madurai, India, underwent slit-lamp examination using LOCS III.
  • 99 subjects were re-evaluated after one year to assess lens changes.

Main Results:

  • High interrater reliability was achieved with the LOCS III scale.
  • 54% of subjects exhibited a change of 0.5 or more in at least one cataract type (color, cortical, nuclear, PSC).

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Conclusions:

  • The LOCS III scale is a feasible tool for in-field cataract assessment.
  • Cataract progression in this population is rapid, supporting intervention studies with smaller cohorts and shorter durations.