Caring for your eyes and vision are important parts of a healthy lifestyle. Vision screening is a simple test of your vision that can detect problems early. An eye exam is a detailed check of your ...

Impaired vision and blindness are not uncommon. About 3.4 million people in the U.S. are visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20.

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Eye chart with an inscription that ...