This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-Ophthalmology, Subject name: Ophthalmology
Toxic amblyopia can be caused by - 
Select and explain. 
A. Ethanol, B. Methanol, C. Ethambutol, D. All
D: All
Answer: D: All 
Explanation: 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.