Q. How does color blindness occur?

Answered by
Dr. Asif Manzoor
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Jul 25, 2016 and last reviewed on: Jun 08, 2020

Hi doctor,

Can color blindness gets generated by means of other issue or problem except birth? Is there any remedy for it?



Welcome to

  • Yes, there are other causes in which color vision could get affected other than congenital or birth causes.
  • Optic nerve damage manifest with abnormal color vision. There may me optic neuritis (inflammation of optic nerve most commonly related to multiple sclerosis), optic atrophy due to toxic (methanol) or nutritional deficiencies.
  • Optic nerve could be damaged after trauma. Some drugs like Ethambutol (for tuberculosis), Amiodarone (used for hypertension) and many other drugs could also damage the optic nerve and can cause loss of color vision.
  • Some diseases that run in families like cone dystrophies can also result in loss of color vision that is not present at birth, but manifests at the second or third decade of life.
  • All these causes are almost irreversible, except if it is due to some drug. Only further damage can be stopped by avoiding the drugs.
  • So, if anybody is having a color vision defect he needs to get a complete eye examination to rule out all the possible causes.

For further information consult an eye care ophthalmologist online -->

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