Colour blindness and Visual disorder

Colour blindness noun - Genetic inability to distinguish differences in hue.

Visual disorder and colour blindness are semantically related. In some cases you can use "Visual disorder" instead a noun phrase "Colour blindness".

Visual disorder noun - Impairment of the sense of sight.

Colour blindness and visual disorder are semantically related. Sometimes you can replace phrase "Colour blindness" with "Visual disorder", this phrases are similar.