Acquired blue blindness is a feature of
Acquired Colour Blindness Acquired blue colour defect (blue blindness) : It may occur in old age due to increased sclerosis of the crystalline lens. It is owing to the physical absorption of the blue rays by the increased a.ambercoloured pigment in the nucleus. Ref:- A K KHURANA; pg num:-305
Disease of optic nerve
Disease of macula
Increased sclerosis of the crystalline lens
All of the above
Neuro-ophthalmology