You can see something 20 feet away that others need to be 15 feet away to see. That means your vision is a little sharper than someone with 20/20 vision. You need to be as close as 20 feet to clearly ...

Background To develop and assess the usability of a smartphone-based visual acuity (VA) test with an automatic distance ... both an Early Treatment Diabetic Retinopathy Study (ETDRS) chart and the ...

Visual acuity was typically recorded using Snellen visual acuity charts and converted to LogMAR for analysis (13). For counting fingers or worse cases, the following conversions were applied: counting ...

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As Congress gears up to pass President Trump’s massive legislative package, one of the biggest fights is over the future of Medicaid. To make their targeted budget numbers, Republicans will ...