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11. Do Color Blind People Only See In Grey?
Ask a layperson about their understanding of color blindness, and most of them assume it affects all colors across the spectrum. It is a common misunderstanding to think color-blind people only see in tones of grey. People dealing with the Deutan and Protan types of color blindness recognize colors, but they have confusion in detecting the difference between red and green.
However, there is a small subset of color blindness known as monochromatic color blindness. Monochromacy affects less than two percent of all people with color blindness, and these individuals can only see in tones of grey. These individuals are more likely to have light sensitivity, and they may need to wear dark sunglasses in strong sunlight conditions.
This type of monochromatic color blindness is rare, and most people suffer from the Deutan and Protan types. In general, people with color blindness can detect around 20 colors, while people with normal vision can see about 100 different hues.