2 years, 3 months ago
What is the physical reason for colorblindness?
I don't want to know about the genetic reason for people being colorblind, I'm just wondering what makes their eyes perceive things differently.
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Human vision relies on two types of cells in the retina - rods and cones. Rods are more sensitive to low levels of light, but do not distinguish colors. Cones require more light to function, but can distinguish colors. There are three types of cone cells, each responsible for seeing a different color - red, green, and blue.
According to http://www.webmd.com/eye-health/tc/color-blindness-topic-overview problems with color vision (a.k.a. color blindness) has to do with those cone cells. If you are missing one or more of these, or if they do not work properly, you will have problems with your color vision, either not seeing color at all (very rare), or not being able to distinguish between certain different shades or colors.
According to http://www.webmd.com/eye-health/tc/color-blindness-topic-overview problems with color vision (a.k.a. color blindness) has to do with those cone cells. If you are missing one or more of these, or if they do not work properly, you will have problems with your color vision, either not seeing color at all (very rare), or not being able to distinguish between certain different shades or colors.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
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