Relationship Between Cooking Fuel and Lens Opacities in South India: A 15-Year Prospective Cohort Study.

Purpose: To determine whether exposure to unclean cooking fuels was associated with subsequent cataract progression as reported in previous cross-sectional studies.

Design: Prospective cohort study.

Methods: This is a secondary observational analysis of the community-based Antioxidants in Prevention of Cataracts trial (ClinicalTrials.