Toxic amblyopia can be caused by ?
Ethanol
Methanol
Ethambutol
All
Ans. is 'd' i.e., All Toxic amblyopia is chronic retrobulbar neuritis which results from the damage to optic nerve by the exogenous poisons. It is frequently bilateral and has a chronic course with permanent visual deterioration. The toxic agents involve may be : Tobacco, ethyl alcohol, methyl alcohol, ethylene glycol, lead, arsenic, cannabis indica, carbon di-sulphide, various drugs like quinine, chloroquine, ethambutol, isoniazid, streptomycin, digitalis (digoxin), amiodaron, NSAIDs, vigabatrin and disulfiram.