Total color blindness usually occurs when an embryo has been exposed to the rubella virus (German measles).

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Total color blindness, also known as achromatopsia, is a genetic disorder inherited in an autosomal recessive pattern. It is not caused by exposure to the rubella virus. However, some forms of color blindness can be caused by environmental factors, such as exposure to certain chemicals or medications.

Total Color Blindness Usually Occurs When an Embryo Has Been