What is it?

Color blindness is a condition that affects the way people see colors. It is an inherited condition, more common in men. People who are color blind, cannot distinguish some colors, such as blue and yellow, or red and green, which is the most common form of the disease. Color vision defects may also be caused due to Parkinson’s disease, cataracts, certain medications, Leber’s hereditary optic neuropathy (LHON) and Kallman’s syndrome.

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Additional names

This group contains additional names:
- Color blind
- Acquired Color Deficiency
- Color Vision Deficiency
- Protan Defect
- Deutan Defect
- Tritan Defect

Signs & symptoms

Symptoms may include seeing washed out colors, or being unable to distinguish two colors, and being informed by other people that the color you think you are seeing is not the right one.


Diagnosis is based upon findings from medical history and eye examination. Further evaluation may include perception tests and genetic tests.


Color blindness has no cure. Some people use special lenses or eyeglasses.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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