Color blindness, or color vision deficiency, causes a person to see colors differently from most other people. There are several types of color blindness. Color vision deficiency or loss has multiple ...

Blindness is completely or severely reduced vision. Contrary to popular belief, most people who are blind have some vision—only about 15% of blindness results in total vision loss. Blindness can occur ...

Learn about causes of gradual and sudden-onset blurred vision, from eyestrain and refractive errors to cataracts and strokes, ...

Permanent vision loss in giant cell arteritis is a complication that is often avoidable with prompt diagnosis and treatment.

There are three main types of color vision deficiency: red-green, blue-yellow, and complete. Color blindness, or color vision deficiency, affects the way you perceive color and can make it hard to ...