What Cause Color Blindness And What Are Its Types

What Is Color Blindness?

Color blindness is also known as color vision deficiency (CVD) is a state where you do not view the color in the traditional way. This can occur if certain cells are known as photoreceptors or more particularly cones in your eyes are missing or not working correctly. These cones typically enable you to see each color on the rainbow. If you have color blindness then you might not recognize these colors.

Do not confuse color blindness with a type of blindness as it can be determined as the condition where you have limited or no sight and color blindness is a single change in the process your eye sees color.

We all see a range of colors, but which ones we see depends on how great our photoreceptors operate. Photoreceptors are cells inside your eyes that respond to particular wavelengths of light. Everyone sees color somewhat differently, and the way we see colors may also vary as we age if we develop some age-related eye conditions such as cataracts.

What Causes Color Blindness?

Color blindness occurs when light-sensitive cells in the retina fail to react appropriately to alternate in the wavelength of light that allows people to see an array of colors.

Photoreceptors in the retina termed rods and cones. Rods are more numerous in which there are almost 100 million rods in the human retina and they are more susceptible to light, but rods are incompetent of distinguishing color. The 6 to 7 million cones in the human retina are capable of color vision and these photoreceptors are concentrated in the central zone of the retina which is named the macula.

The inherited form of color blindness usually is related to deficiencies in some types of cones absence of these cones. Besides varieties in genetic makeup, other matters of color vision defect include:

Parkinson’s Disease(PD)

PD is a neurological disorder so it causes color blindness as the light-sensitive nerve cells in the retina wherever the vision processing happens may be damaged and can not work properly.


Clouding of the eye’s natural lens that occurs with cataracts can switch out color vision making it much less bright. Luckily, cataract surgery can heal bright color vision when the cloudy natural lens is eliminated and replaced with an artificial intraocular lens.

Certain Medications

For instance, an anti-seizure drug which is called tiagabine has been shown to reduce color vision in about 41 percent of those taking the drug, although effects do not seem to be changeless.

Leber’s Hereditary Optic Neuropathy(LHON)

This type of inherited optic neuropathy can attack even carriers who do not have additional symptoms but do not have a degree of color blindness. Red-green color vision deficits primarily are remarked with this condition.

Kallman’s Syndrome

This inherited condition means failure of the pituitary gland which can lead to incomplete gender-related development before-mentioned as sexual organs. Color blindness can be a symptom of this condition.

Color blindness also can happen when the aging process damages the retinal cells. An injury to the area of the brain where vision processing takes place can also cause color vision insufficiencies.

What are The Three Type Of Color Blindness?

There are 3 principal types of color blindness.

In one type, the person has difficulty telling the differentiation between red and green. In another type, the person has trouble telling yellow and blue apart. The third type is named achromatopsia. A person with this form can not notice any colors at all. Everything that seems gray or black and white. Achromatopsia is the least basic form of color blindness. It can be either be inherited or also acquired.

Inherited Color Blindness

Inherited Color Blindness is more obvious. It is due to a genetic defect which means that the condition progresses down through the family. Someone who has close family members who are colorblind is more possible to have the disease as well.

Acquired Color Blindness

Acquired color blindness occurs later in life which concerns men and women equally. Diseases that harm the optic nerve or the retina of the eye can begin acquired color blindness. For that inference, you should alert your doctor if your color vision alternates. It might symbolize a more serious underlying issue.

Last Updated on October 11, 2023 by anup