bioRxiv / medRxiv
open access
The hidden burden of eye-care needs: how visual acuity definitions change estimates of need in 12 RAAB surveys across six countries
PurposeRapid Assessment of Avoidable Blindness (RAAB) surveys are widely used to estimate the prevalence and causes of blindness and vision impairment among adults aged 50 years and older. We examined how far estimates of eye-care need depend on whether presenting or pinhole acuity, and unilateral o
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