Which of the following is the 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.