What problems are associated with color blindness?

Normal color vision requires healthy function of the macula and optic nerve. The most abnormality is red-green color blindness that happens in 8% of male patients. This is X-linked congenital deficiency of one specific type of retinal photoreceptor. Depressed color vision may also be a sensitive indicator of certain kinds of macular or optic disease. For example, if a person was punched by a fist, he or she would feel color abnormality that could be judged by color blindness test book. The other examples are optic neuritis or optic nerve compression or tumor. Ishihara or Hardy-Rand-Rittler are the common testing technique. FM-100 is the advanced test technique.

If you or your family are color blindness, the first problem is you could not distinguish traffic lights and sometimes cause danger. And you would live in a colorless world. When you browse a webpage, you would find most of the page are very ugly in fact they are very beautiful. Color blindness would cause a lot of problems. One way to figure out the problem is to wear a kind of achromatopia contact lens to promote this dysfunction. But this could not cure blindness. You could tell people right or left is brighter to instead red or green.