Red, green and blue are the three kinds of color receptors present in our eyes. There are also black and white receptors. They are more responsive in contrast to the color receptors and are primarily responsible for our inability to perceive color in the dark.
Color blindness occurs due to the absence of one or more kinds of color receptors. The majority of defects pertaining to color perception are associated with red or green or both. Nearly 10% of males possess an imperfection in perceiving colors, but this is occasionally traced in females. Red-green color blindness is attributed to the absence of red receptors.
Another type of color blindness — yellow-blue is the second type of defect that is found, but it is not very common. There is also a likelihood of a complete absence of all the color receptors, leading to black and white vision.
Color blindness is not a type of blindness by any means, but is a flaw in the manner a person perceives color. With this difficulty in vision, persons face problems in differentiating between certain colors like red and green or blue and yellow. Red-green color imperfection is the most widespread type of color blindness and a less familiar type is blue-yellow color imperfection.
Symptoms of Color Blindness
The initial indication of color blindness surfaces when individuals have difficulty in discerning if colors are red and green, or blue and yellow.
Contrary to the general perception, it is extremely uncommon that a color-blind person would see only in neutral colors or shades of gray.
Causes of Color Blindness
- Color blindness takes place when specific cells in the retina that usually react to color do not react in the manner they should.
- Generally the problem of color imperfection is present at birth, and the trouble distresses a greater number of men than women.
- Color blindness is triggered by a common X-related recessive gene.
- This implies that, if a person is color-blind, his or her mother must either be color-blind, or possess normal vision but pass on the color-deficient gene.
- Color-blind fathers transmit the gene to only their daughters, who will possess color vision that is normal unless their mother also possess the color-deficient gene.
- Retinal cells can be damaged when a person grows old. It can also be affected by ailments, which in certain instances, can result in almost complete color blindness.
Treatment of Color Blindness
There is no proper cure for color blindness. However, if a person has problems in differentiating colors, or this problem is noticed in children, help should be sought from eye specialists
Identifying color-vision imperfection in the initial stages may check difficulties in learning during the years in school. This is because a large number of learning materials are based greatly on the perception of color. If a child suffers from a color imperfection, it will be wise to inform the teachers about it, so that their lessons can be structured according to their needs.