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Ishihara
Landolt C
Rainbow
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Confetti
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Vision Type
Protanopia: Red light is invisible to the eye. Reds appear dark. Affects ~1% of males.
About Color Blindness
The human eye has 3 cone types for color vision. When one or more cone type malfunctions, color blindness occurs.
L-cones (red)
M-cones (green)
S-cones (blue)
Rods (night)