Medically reviewed by Johnstone M. Kim, MD The term "20/20 vision" refers to how sharp your eyes are when you look at a ...

Depending on the cause, vision loss may occur suddenly or gradually and in one or both eyes. Some types of vision loss are temporary or reversible. Vision problems are a common disability in ...

Kaleidoscope vision is just one of several types of auras that occur in response to a sudden increase in neuronal activity. They can also affect a person’s sense of smell, touch, and hearing.

Sometimes, a condition can't be helped with medication. Refractive errors, some of the most common types of vision problems, ...

What does vision insurance cover? It's important to know before deciding on a policy. Use our guide to learn more and find the right plan. Buying coverage? It helps to know the types of vision ...