ICD-11 definition : Colour vision refers to the ability to distinguish colour differences. True colour
blindness is extremely rare. Most colour vision deficiencies are minor, and congenital,
with X-linked recessive inheritance (more prevalent among men). Some drugs and optic
neuritis may also cause colour vision deficiencies.;
Colour vision refers to the ability to distinguish colour differences. True colour
blindness is extremely rare. Most colour vision deficiencies are minor, and congenital,
with X-linked recessive inheritance (more prevalent among men). Some drugs and optic
neuritis may also cause colour vision deficiencies.