Color vision deficiency and Dichromasy

Color vision deficiency noun - Genetic inability to distinguish differences in hue.

Dichromasy and color vision deficiency are semantically related. In some cases you can replace term "Dichromasy" with "Color vision deficiency", this terms are similar.

Dichromasy noun - A deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision).

Color vision deficiency and dichromasy are semantically related. You can use "Color vision deficiency" instead a noun "Dichromasy".