Some Causes of Colour Vision Impairment : Genetic Some ocular and other causes Drugs exposure to chemicals Ageing Genetically inherited colour vision loss is more common in males than females. Some other causes: Sickle Cell Anaemia diabetes Alzheimer’s Parkinsonism Glaucoma Macular Degeneration Chronic Alcoholism Leukaemia Drugs ethambutol some antidepressants some drugs used in erectile dysfunction exposure to chemicals carbon disulphide some fertilizer exposure ageing is known to cause colour vison impairment.