Colour Blindness
The following pictures show my colour wheel, in its original form, and
after adjustment to simulate protanopic (red deficient) and deuteranopic (green deficient) red/green colour-blindness. The images were processed using VisCheck.
| Normal vision (92% of men)
| Protanopia (1% of men)
| Deuteranopia (5% of men)
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The protanopic version shows the colours I see thus the first two images
look identical to me. The third image is the most common form of
red/green colour-blindness. (Most people find the second and third
images very similar, but they are quite different to me).
Examples
These are on separate pages, to reduce colour distractions. Note that
the simulations do not address the philosophical questions of
subjective experience, but they do demonstrate a striking reduction in
the colour space without affecting the image as I see it. It is of
course possible that the colour space could be reduced further, or to
a different subset, with equivalent results.
- Photo of me.
- Vermeer painting.
- Wildlife.
- Landscape.
Links
Back.
| Kathryn Cowtan: |  |
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Keywords: color, colorblind, colourblind.