1 doctor weighed in:

What are the different kinds of color blindness?

1 doctor weighed in
Dr. Richard Bensinger
Ophthalmology

In brief: Several

The major ones are confusion of red and green/ blue and yellow/ and an off green and off red.
Most common are subtle forms of these which allow major color differences to be seen. We test these with color confusion plates that are subtle and strong, to make the distinction. Color vision is also lost with advanced diseases like diabetes and retinitis pigmentosa.

In brief: Several

The major ones are confusion of red and green/ blue and yellow/ and an off green and off red.
Most common are subtle forms of these which allow major color differences to be seen. We test these with color confusion plates that are subtle and strong, to make the distinction. Color vision is also lost with advanced diseases like diabetes and retinitis pigmentosa.
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