<prompt> Toxic amblyopia can be caused by -EthanolMethanolEthambutolAll  <response>: Ans. is d i.e., All o Toxic amblyopia is chronic retrobulbar neuritis which results from the damage to optic nerve by the exogenous poisons.o It is frequently bilateral and has a chronic course with permanent visual deterioration.o 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. 