The reliability and reading times of the charts were compared in a stratified sample of 40 eyes of 40 ophthalmic patients with a variety of stable eye diseases. In order to simulate a clinical setting ...

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 ...

Smartphone-based Snellen visual acuity charts has become popularized; however, their accuracy has not been established. This study aimed to evaluate the equivalence of a smartphone-based visual acuity ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. An inscription reads “SEITZ TEST ...

The chart priced at $2,200 has a metal lamp visor and a linen scroll with letters of different sizes. There doesn’t seem to be any type of antique that isn’t sold at auctions, flea markets or shops.

A standard ophthalmic exam is a comprehensive series of tests done by an ophthalmologist or optometrist. These doctors specialize in eye health. They’ll use these tests to check both your vision and ...