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OBJECTIVE: Determine prevalence of blindness and visual impairment in adults aged >50 years in Panama, identify their main causes, and characterize eye health services. METHODS: Cross-sectional population study using standard Rapid Assessment of Avoidable Blindness methodology.

Fifty people aged >50 years were selected from each of 84 clusters chosen through representative random sampling of the entire country. Visual acuity was assessed using a Snellen chart; lens and posterior pole status were assessed by direct ophthalmoscopy. Cataract surgery coverage was calculated and its quality assessed, along with causes of visual acuity 20/60 and barriers to access to surgical treatment. RESULTS: A total of 4 125 people were examined (98.2% of the calculated sample). Age- and sex-adjusted prevalence of blindness was 3.0% (95% CI: 2.3-3.6). The main cause of blindness was cataract (66.4%), followed by glaucoma (10.2%). Latin Hypercube Sampling Software Download here.