<prompt> The propey which makes betaxolol different from timolol is that betaxolol :is a b1 selective blockeris more efficacious in glaucomaproduces less ocular side effectsis shoer acting  <response>: Betaxolol is cardioselective Beta blocker i.e Beta-1 blocker Timolol is non-selective Beta blockerBeta 1 Beta 2 Betaxolol - less bronchopulmonary and less cardiac, central and metabolic side effects. Betaxolol has protective effect on retinal neurons independent of i.o.t. lowering, by blocking some Ca2channels and reducing NaCa2 influx. This action is more prominent in betaxolol than in timolol. Betaxolol is less efficacious in lowering i.o.t. than timolol, because ocular Beta receptors are predominantly of the Beta 2 subtype. 