The term "20/20 vision" refers to how sharp your eyes are when you look at a standard eye chart (Snellen chart) from a distance of 20 feet (or 6 meters)—depending on where you live. In the United ...

A person with peripheral vision loss has difficulty seeing things above, below, or at the side without turning their head. This type of vision loss is also known as tunnel vision. Tunnel vision can ...

Macular degeneration is a condition that affects a small part of the retina at the back of the eye, called the macula. It can cause visual disturbances, such as blurring, blind spots, and distorted ...

Worried you might have hurt your eyes watching the eclipse? If they’re just a bit sore or dry, it doesn’t necessarily mean anything bad happened. It’s normal for your eyes to tire from staring at ...