Antitubercular drug causing ophthalmic toxicity is:: (A) Isoniazid, (B) Rifampicin, (C) Ethambutol, (D) None of above
Answer is C. Ans, C EthambutolOptic neuritis due to ethambutol:* Reversible* Loss of red green color discrimination* Central scotomasExtra Edge points:Rifabutin and Rifampin can also orange tan discoloration of tears and contact lenses.