Basic lesion in tobacco amblyopia is
Tobacco amblyopia It typically occurs in men who are generally pipe smokers, heavy drinkers and have a diet deficient in proteins and vitamin B complex; and thence also labelled as 'tobacco-alcohol-amblyopia. Pathogenesis: The toxic agent involved is cyanide found in tobacco. Ref:- A K KHURANA; pg num:-296
lschaemia of optic nerve fibres
Degeneration of ganglion cells especially of macular region
Degeneration of foveal cones
All of the above
Neuro-ophthalmology