Title: Color Vision Exercise.

The following are some visual stimuli to illustrate some aspects of and a theory on color vision.
On one set of visual stimulus (where there are 2 boxes of different colors and a circle within each box), one might see that the colors of each circle appear to be different. But are they really?
For each of the other 2 sets of visual stimuli, stare at the colored circle for 10 seconds, then divert your vision elsewhere against a plain white surface. What do you see?

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Editor by: Berdi Dwijayanto