Betaxol 0.5% Eye Drops contain Betaxolol Hydrochloride, a cardioselective beta-adrenergic receptor blocker. This medication is primarily used to reduce elevated intraocular pressure (IOP) in patients with ocular hypertension and chronic open-angle glaucoma. By decreasing the production of aqueous humor within the eye, Betaxol helps lower IOP, thereby reducing the risk of optic nerve damage and vision loss.