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http://www.physics.umd.edu/deptinfo/facilities/lecdem/services/demos/demoso4/o4-07.htm

O4-07: Optical Illusions - Miscellaneous

Color Deficiency

• Can result from a lack of one or two types of cones

• Can result from different wavelength response from one or more cone types

Color Deficiency

Monochromats - see one color - very rare

Dichromats - see two colors

Trichromats - see three colors

Various deficiencies

Usually gender-linked

~ 8% of males; ~ 0.5% of females

Color Test

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25

45

6

8

Color Blindness

• ~ 5-10% of males• 0.5% of females

• different varieties• Most common - dichromat

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What a dichromat sees

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