The classic example of an eye test is the Snellen eye chart, developed by Dutch eye doctor Hermann Snellen in the 1860s. Today, there are many variations of the Snellen tes… See more

Sometimes eye doctors can’t use a standard Snellen eye chart. In these situations, the doctor might use a modification of the Snellen test called a “tumbling E… See more

To evaluate your near vision, your eye doctor may use a small hand-held card called a Jaeger eye chart. The Jaeger chart consists of short blocks of text in various type sizes. … See more

20/20 vision is considered “normal” vision. It means that, while standing 20 feet away, you can read a letter that most human beings shouldbe able to read from 20 feet. In the Unite… See more