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A colorblindness tutorial

Filed under: Dear readers — Dan at 9:31 pm on Monday, April 25, 2005

Explaining the fact that I am colorblind is usually annoying. Therefore, here is a brief tutorial on what it means to be colorblind. Hopefully, you’ll understand that colorblind people don’t see in black and white. Very few people actually do.

This is a good site about colorblindness. It says, “Color blindness (color vision deficiency) is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition. Red/Green color blindness is by far the most common form, about 99%, and causes problems in distinguishing reds and greens. Another color deficiency Blue/Yellow also exists, but is rare and there is no commonly available test for it.”

What do you see here?

Apparently, there’s a 45 in the circle. I, however, see nothing but spots.

What about here?


See a six and an eight? Again — all I’ve got is spots.

“There is no treatment for color blindness, nor is it usually the cause of any significant disability. However, it can be very frustrating for individuals affected by it. Those who are not color blind seem to have the misconception that color blindness means that a color blind person sees only in black and white or shades of gray. While this sort of condition is possible, it is extremely rare. Depending on just which figures you believe, color blindness seems to occur in about 8% - 12% of males of European origin and about one-half of 1% of females.”

My brother is colorblind too. So was my mom’s dad. It’s usually inherited from the mother, who’s a carrier of the colorblind gene. So if you’re a colorblind male, any grandsons you have from a daughter run the risk of colorblindness.

Go here to do a little colorblindness test.

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