Deutan colour-vision defects comprise deuteranomaly (anomalous trichromatic colour vision) and the more severe and less common deuteranopia (dichromatic colour vision). Deuteranomaly occurs if a ...

Protanomaly is a common, X-linked abnormality of color vision. Like people with normal color vision, protanomalous observers are trichromatic, but their ability to discriminate colors in the red–green ...

Background Mutations in the L/M cone opsin gene array cause abnormally high perceived retinal contrast and the development of myopia. Environmental factors may also lead to high visual contrast and ...