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Negative afterimage. O4-07: Optical Illusions - Miscellaneous. http://www.physics.umd.edu/deptinfo/facilities/lecdem/services/demos/demoso4/o4-07.htm. Color Deficiency. Can result from a lack of one or two types of cones
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O4-07: Optical Illusions - Miscellaneous http://www.physics.umd.edu/deptinfo/facilities/lecdem/services/demos/demoso4/o4-07.htm
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
Usually gender-linked ~ 8% of males; ~ 0.5% of females
Color Test 25 6 45 8
Color Blindness • ~ 5-10% of males • 0.5% of females • different varieties • Most common - dichromat