A colour vision deficiency is also innate in most cases with many visual impairments. Men are more commonly affected than women.
Colour vision deficiency or colour blindness? The two terms are often used as synonyms. But the hereditary vision problems are by no means equal: Protanomaly or deuteranomaly describes a red or green colour vision deficiency. This means the colours can only be detected when they are particularly saturated and strong.
Colour blindness for different colours is called anopsia. In the case of protanopia or deuteranopia the affected individual is missing the colour receptors for red or green on the retina and the two colours are perceived as bright grey shades. Unfortunately, there are no treatment options available for a colour vision deficiency or colour blindness. However, with tinted lenses the frequently occurring light sensitivity can be alleviated.