How many people are colorblind?
About 8% of all males have some sort of color deficit, but for females it is about 1/2% (see the webexhibits causes of color site). Assuming that the current world population is 6,552,504,794 (see the US Census Bureau population clock) and that half of those are male, this gives: 6,552,504,794 * 0.5 * 0.08 + 6,552,504,794 * 0.5 * 0.005 = 278,481,454. Of course, we don’t really know the numbers so exactly, so we can round off our estimate. So, I would say that a good estimate is about 280,000,000 color-deficient people in the world today (October 24, 2006).If you want to break it down by type of color deficit and/or severity, you can use the estimates from the webexhibits causes of color site to compute your own values.
