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 ...

Warby Parker is updating its vision-testing iPhone app in a big way. It can now perform an eye test requiring only 10 feet of space, 10 minutes, and good lighting. It’s also only $15 and is available ...

Color blindness is a condition where people find it difficult to distinguish between certain colors. This color blindness test is a simple eye test to find out whether or not you are color blind.

Age played a part in the decrease in vision testing in adolescents, along with fewer reported tests in primary and school-based settings. The decrease in vision testing as a function of age in primary ...

Scientists are making dramatic strides toward a goal that once seemed almost unimaginable: Restoring limited vision to people affected by a previously irreversible form of blindness caused by an ...