"This study aimed to evaluate the equivalence of a smartphone-based visual acuity chart with a standard 6-m Snellen visual acuity (6SVA) chart." Researchers first reviewed Snellen chart apps that were ...
Researchers found that eyeglasses with traditional steps of 0.25D were less effective and less preferred by participants compared with those refracted in 0.05D steps. Eyeglasses manufactured and ...
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