Question

What is the cause of colour blindness?

Answer 1

Hint: Colour blindness is a type of problem in seeing or identifying different colours such as blue, green and red. There are also some rare cases found where a person cannot see and identify any colours at all. A person who has this syndrome also faces problems in differentiating the colours with shades.

Complete answer:
Colour blindness is a type of deficiency which is also known as colour vision deficiency. This is the case where the ability to see a colour or make a difference in colour is decreased. It can weaken people to do various work such as selecting ripe fruit, choosing clothes, and reading traffic lights. Colour blindness causes difficulties in educational activities also. Though this type of problem is generally minor, and most colour-blind people adapt to the condition. There are some cases where people who have total colour blindness and the condition is known as achromatopsia.

Generally, there are two kinds of colour blindness and that are Monochromacy and Dichromacy. In the case of monochromacy two or three-cone pigments i.e. red, blue, and green are absent or damaged. This may lead to total colour blindness. In the case of dichromacy, any one of the cone pigments is absent or damaged. This causes partial colour blindness.

There are different causes of colour blindness. An inherited problem in the development of one or more of the three sets of cone cells is the most common cause of colour blindness. In a human eye retina, there are two light-sensitive cells; rod cells and cone cells.

The rod cells are used to see low light and the cone cells are used for normal and bright light. These cells are responsible for colour vision. When these two light-sensitive cells fail to perform their functions then it causes colour blindness.

There are also some other factors, which are responsible for a colour vision problem in a person such as damage in the nerve cells of the brain or eye, genetic disorders, side effects of drugs, high consumption of tobacco and alcohol.

Note: Colour blindness is a type of disorder in the vision of human beings. In that case, the person becomes unable to see a colour or identify the colour. This problem causes various problems in the daily life of the affected person. This problem may be caused by a hereditary problem. When the cone cells that are present in the eyes and responsible for the identification of the colour, fail to perform its duty, then it causes colour blindness. Sometimes damage in the nerve cell of the eyes also leads to colour-blindness.