Dorzolamide decreases pressure in the eye and is used for treatment of glaucoma. It may be used in an unaffected eye to prevent glaucoma when glaucoma is already present in the other eye.

Methazolamide is used to treat certain types of glaucoma (open-angle) in dogs.

Timolol is a beta-blocker that decreases pressure in the eye. It is used in the eye for treatment of glaucoma. It may be used in an unaffected eye to prevent glaucoma when glaucoma is already present in the other eye.