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Negative afterimage

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

jolie-williams
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Negative afterimage

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  1. Negative afterimage

  2. O4-07: Optical Illusions - Miscellaneous http://www.physics.umd.edu/deptinfo/facilities/lecdem/services/demos/demoso4/o4-07.htm

  3. 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

  4. Color Deficiency Monochromats - see one color - very rare Dichromats - see two colors Trichromats - see three colors

  5. Various deficiencies

  6. Usually gender-linked ~ 8% of males; ~ 0.5% of females

  7. Color Test 25 6 45 8

  8. Color Blindness • ~ 5-10% of males • 0.5% of females • different varieties • Most common - dichromat

  9. What a dichromat sees

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