Color blindness is an eye condition in which someone can't see the difference between certain colors. Though many people commonly use the term "color blind" for this condition, true color blindness — in which everything is seen in shades of black and white — is rare. The medical term for color blindness is known as color vision deficiency.
Symptoms Symptoms of albinism involve skin, hair and eye color, as well as vision. Skin The easiest form of albinism to see results in white hair and very light-colored skin compared with siblings or other blood relatives. But skin coloring, also called pigmentation, and hair color can range from white to brown. People of African descent who have albinism may have skin that is light brown or ...
A color vision test, also known as the Ishihara color test, measures your ability to tell the difference among colors. If you don’t pass this test, you may have poor color vision, or your doctor may ...
Diagnosis If you have trouble seeing certain colors, an eye care professional can test for a color deficiency. Testing likely involves a thorough eye exam and looking at specially designed pictures. These pictures are made of colored dots that have numbers or shapes in a different color hidden in them.
Overview Regular urine color ranges from clear to pale yellow. But certain things can change the color. Foods such as beets, blackberries and fava beans can turn urine pink or red, for example. And some medicines can give urine vivid tones, such as orange or greenish-blue. An unusual urine color also can be a sign of a health problem. For instance, some urinary tract infections can turn urine ...