Doctors prescribe eye drops with beta blockers, prostaglandin analogs, alpha agonists and carbonic anhydrase inhibitors to treat glaucoma, according to the Glaucoma Research Foundation. Eye drop medications that contain a combination of these drugs simplify dosing schedules and increase medication compliance in some patients.
The goal of glaucoma treatment is to decrease intraocular pressure in order to protect the optic nerve, reports the Glaucoma Research Foundation. Prostaglandin analogs, such as Xalatan and Travatan Z, increase the drainage of fluid from the eye. Beta blockers, such as timolol, and carbonic anhydrase inhibitors, such as Tusopt and Azopt, decrease fluid production. Alpha agonists, such as AlphaganP, increase the drainage rate and decrease the fluid production within the eye.