Red-Green Color blindness is predominantly found only in men. Blue-yellow color blindness is rare, only 5% of color blind people have it. In caucasian societies up to 1 in 10 men have it, whereby only 1 in 100 Eskimos suffer from color blindness. Cataracts, which are not included in the table below develop in the crystalline lens of the eye, and have the effect of dulling colors, and blurring vision.