Which of the following is longest acting ocular Beta blocker: (A) Timolol, (B) Betaxolol, (C) Caiolol, (D) Metoprolol
Answer is B. Ref-KDT 6/e p145 Betaxolol is a cardioselective Beta blocker useful in glaucoma. It is longer acting than timolol. Another non selective Beta blocker used topically for the treatment of glaucoma is levobunolol