Colour Blindness: Causes, Diagnosis & Treatment

Tue Jun 23 2020
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Is colour-blindness inherited? Know about its causes and treatment

Colour blindness, also known as colour deficiency, happens when a person is unable to distinguish between specific colours. A person suffering from colour blindness does not see some colours (usually green, red, and occasionally blue) in the usual way. The most common form of colour vision deficiency is red-green colour vision.

Our retina has two types of cells to detect light. These are called rods and cones. Rods are responsible for detecting dark and light. They allow us to see at night. Rods have a low spatial acuity, while cones are responsible for high spatial acuity. They are capable of detecting colours. Our brain takes input from cone cells to determine colour perception.

Colour blindness symptoms

Do you face difficulty in detecting if the colours are yellow or blue, green, or red? Do other people inform you that the actual colour is different from what you are identifying?

If yes, then these Jun be primary signs of you having a colour vision deficiency. It would help if you got your vision disorder checked by an ophthalmologist.

What causes colour blindness?

Usually, genes inherited by a person from his/her parents cause defective photopigments in your retina.

Sometimes, colour blindness occurs of other reasons as well, like:

  • Damage the optic nerve
  • Cataract
  • Ageing
  • Damage to the part of the brain that process colour information
  • Chemical or physical damage to the eye

Colour blindness diagnosis

Your eye specialist Jun conduct some tests to diagnose colour blindness. These tests help the doctor to identify which colour deficiency the patient is suffering from.

  • The doctor Jun ask the patient to make a pattern of number or alphabet with sets of coloured dots. If you are not colour blind, then you will easily tell a number or alphabet from the pattern. If you are colour blind, then you will face a hard time identifying the alphabet or number from the pattern. You Jun not see anything in the pattern at all.
  • The doctor Jun ask the patient to make chips of similar colours.
  • In some cases, vision screening is also recommended.

Colour blindness treatment

Unfortunately, there is no cure for colour blindness. Most people with colour blindness learn to adapt and live life with this condition. While there are people for whom this eye disorder is a minor inconvenience.

Though, contact lenses and eyeglasses with certain filters do help in colour deficiencies. Coloured filters over eyeglasses Jun enhance your contrast perception. But these lenses can not improve your ability to see all colours.

Living with colour blindness

If you have to work around colour blindness, then here are some ways that can help you:

  • You can memorize the order of coloured objects, like traffic lights
  • You can take help of someone with good colour vision to sort your clothing and other things you wish to match
  • You can use a smartphone or tablet specially designed for people suffering from poor colour vision
  • Ensure the lighting in the workplace and at home is adequate so that you do not get more confused between distinguishing colours

Some facts about colour blindness

  • Everyone sees colours a little differently-even when people are not colour blind
  • About 1 in 12 men are colour blind
  • Babies are born colour blind. With their growth, their colour vision improves and gets developed by the six months of age.
  • A person can be colour blind in one eye and can have normal vision in the other. This is called unilateral dichromacy, which is very rare.
  • Contrary to belief, dogs don't actually see in black and white. They have two types of cone cells and see mostly in blue and yellow.
  • It is estimated that about 300 million are colour blind in the world.

Centre for Sight treats an array of eye disorders. The guiding principle for achieving excellence in eye care is to provide honest clinical opinions using the latest technology. We have one of the best teams of doctors, surgeons, consultants, and other staff for your treatment. Through thorough testing, the condition of the patient’s eye is diagnosed with accuracy, and then the correct procedure is suggested. We specialize in various fields like Lasik & refractive surgery, cornea services, ocular surface & dry eye disorders, computer vision syndrome, pediatric ophthalmology & squint, cataract, and glaucoma services.




Article: Colour Blindness: Causes, Diagnosis & Treatment
Author: CFS Editorial Team   |   Jun 23, 2020 | UPDATED 01:19 IST

*The views expressed here are solely those of the author in his private capacity and do not in any way represent the views of Centre for Sight.
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Colour Blindness is an eye disorder that causes colour vision deficiency. Here’s the complete guide about Colour Blindness causes, symptoms, and treatment.
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