Timitrol 0.5% Eye Drop is used to treat open-angle glaucoma and ocular hypertension in patients with raised intraocular pressure, or high pressure inside the eye. Timitrol 0.5% Eye Drop is a member of the beta-blocker drug class. It is used to lower ocular hypertension, or eye pressure. Glaucoma is a condition that can result from this pressure. Your vision may be harmed if your eye pressure is too high. This medication functions by facilitating the passage of fluid into your bloodstream from inside your eye. It can be applied with other eye drops or by itself. It may become less effective if you use it too frequently.