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Ever since I was told I had an astigmatism and got glasses
to match there have been rather significant chromatic aberrations at the edge of each lens (red/yellow or blue
depending on which side). The cool part is that certain
colors will appear offset (z) compared to other colors. For
looking at a whiteboard with red and blue
writing, the red text will appear to 'popout' and the blue
with appear inset. Thats what I think is going on, but I
could just be losing my mind.
The idea is to exploit this 3d effect by generating graphics
with these colors intentionally to produce the effect on
objects. This would take some experimentation and but
red-er shades could used for negative z, and blue-er for
positive z. Not practical for full color objects, and a very
limited market, but for other people with an astigmatism
a cheap "no extra glasses required" possibility.