Colour blindness Flashcards
1
Q
Prevelence
A
8% of white, 5% of asian and 3% of african males
Prob is 10 times less in females
2
Q
Tests for color blindness
A
Lot of them, best known is Ishihara plate (looking for number in dot field)
3
Q
Anomalous trichromacy
A
Normal vision except for 1 cone
Red A = Protanomaly
Green A = Deuteranomaly
Blue A = Tritanomaly
4
Q
Dichromacy
A
One cone missing
Red = Protanopia (comon)
Green = Deuteranopia (most comon)
Blue = Tritanopia (rare)
5
Q
Achromatopsia
A
Total colorblindness, also very unsharp vision, very rare.
6
Q
Superior color vision
A
tetrachromacy, an extra A cone. Would allow to see more colours. Very few cases known and cant be tested with normal screen. Controversial.
7
Q
Blue cone monochramacy
A
Only the blue conelaso very rare.
