Colour blindness and Green-blindness

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

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

Green-blindness noun - Dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red.

Colour blindness and green-blindness are semantically related. Sometimes you can replace phrase "Colour blindness" with "Green-blindness", this phrases are similar.