Please provide your email address to receive an email when new articles are posted on . PHILADELPHIA — A hand-held internally illuminated ETDRS device provided accurate and repeatable visual acuity ...

"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 ...

Please provide your email address to receive an email when new articles are posted on . SAN DIEGO — A handheld ETDRS device may offer benefits of convenience and portability, as well as the ability to ...

Acuity of vision is a term used to describe the clearness or sharpness of your vision when measured at a distance of 20 feet. ‌ Visual acuity is the most common clinical measurement of how your eyes ...

Impaired vision and blindness are common. About 3.4 million people in the US are blind or visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20 ...