Point of Order: "colour blindness" is a misnomer for what is more accurately called "colour deficiency" since being truly colour blind would mean you saw only

Point of Order: "colour blindness" is a misnomer for what is more accurately called "colour deficiency" since being truly colour blind would mean you saw only in some kind of grayscale. Source: my father is an OD and my brother has almost no red cones at all.