6J11.70 - Color Blindness

Code Number:
Demo Title:
Color Blindness
Parameters of the Human Eye
Area of Study:
Color Blind Charts and Red and Yellow Filters.

Place the filters over the color blind chart figures.  People with normal vision should see a number appear.  People with color blindness will not be able to see a number and this blindness may be color specific (they may not see the number with the red filter, but they will see it will the yellow filter).

  • Ronald D. Edge, "Color Blindness", TPT, Vol. 21, #4, Apr. 1983, p. 264.
  • W. A. H. Rushton, "Visual Pigments and Color Blindness", Scientific American, Vol. 232, #3, Mar. 1975, p. 64.
  • Nicole Wetsman, "Color-Blinded by the Light", Popular Science, Vol. 291, Summer 2019, p. 120.
  • Pat Murphy, Ellen Macaulay, and the Staff of The Exploratorium, "Color", Exploratopia, p. 301.
  • Ron Hipschman, "Recipe No. 165: Color Table, Exploratorium Cookbook III, p. 165-1 - 165-3.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.