27. colour blidness is caused due to a.sex-linked abnormality b.deficiency of vitamin c c.absence of rods in retina d.absence of visual purple in retina
Diseases. Some conditions that can cause color deficits are sickle cell anemia, diabetes, macular degeneration, Alzheimer's disease, multiple sclerosis, glaucoma, Parkinson's disease, chronic alcoholism and leukemia
