Color blindness is more common in men than women due to a defective X chromosome. Red-green blindness is the most common form, and it can be caused by genetics, brain damage, or retina damage. John Dalton was the first to document color blindness, and famous color blind people include Mr. Rogers, Matt Lauer, Jack Nicklaus, and Paul Newman.
Color blindness is more common in males than in females: about 7% of men are colorblind compared to about 0.4% of women. This means that for every color-blind woman, there are approximately 17 color-blind men. This is likely because color blindness is part of a defective X chromosome. Men have only one X chromosome, while women have two: a good one can compensate for a bad one, yielding to fewer color-blind women.
Other facts:
The most common form of color blindness is red-green blindness.
There are various levels of color blindness, which can more appropriately be described as color deficiency.
Although color blindness is usually inherited genetically, it can also be caused by brain damage (eg, from shaken baby syndrome or traumatic accidents) or damage to the retina caused by ultraviolet light.
John Dalton, a color-blind English chemist, was the first to scientifically document color blindness in the late 1700s. The condition is sometimes called color blindness after him.
Famous color blind people in the US include Mr. Rogers, Matt Lauer, Jack Nicklaus and Paul Newman.
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