Incomplete and Complete Achromatopsia

Incomplete and complete full color blindness requires rods and cones to achieve normal vision. More than 100 million bars are around the human eye, and about 6 million cones form the fovea. Both rods are sensitive to light and can not distinguish wavelengths, so colors can not be detected and gray and black and white shadows are perceived. On the other hand, there are three kinds of cones containing specific pigments. They are classified as red, blue and green by the most sensitive wavelength.

In general monochrome called full-color blindness, vision is difficult under ordinary intensity light, in addition to no color distinction, because the retina does not contain a cone. It is usually rare, but Pingelap island is very colorful. Pingereap island is a part of the Federated States of Micronesia and is called Maskon. About 10% of the population owns it. % Is an unaffected carrier. The island was damaged by a storm of the 18th century (an example of a genetic bottleneck), and one of several male survivors had a full-color blind gene. Before foreign troops brought illness to the island in the 1940 's, the population increased to thousands.

There are various kinds of color blindness, but full color blindness or full color blindness may be most easily understood. This is the rare form of color vision abnormality. At this time, colors are completely invisible. The color acceptor disappears almost completely in this form, while the white and black receptors remain intact. However, this situation is often misdiagnosed if it is not tested properly. There are three basic types of color vision abnormality. Severity abnormality, color vision abnormality, and tri-color vision abnormality. Severe disease is a condition for people to deal with green issues. These people are one of the biggest color blind groups. Many times, these people also have red problem. These people can often distinguish red and green from other colors, but if so, it is very difficult. Many people regard it as white