Beta adrenergic blocking agent used to treat glaucoma; prepared as an ophthalmic preparation.

• A. Propranolol
• B. Timolol
• C. Nadolol
• D. Atenolol

Answer: (B)

The key idea is that blocking beta-adrenergic receptors in the eye reduces the production of aqueous humor, which lowers intraocular pressure in glaucoma. Timolol fits this purpose because it is a nonselective beta-blocker formulated as an ophthalmic preparation (eye drops) specifically used to decrease aqueous humor formation at the ciliary body.

The other drugs listed are systemic beta-blockers, not ophthalmic formulations for glaucoma. Propranolol, nadolol, and atenolol are typically used systemically rather than as eye drops, and they aren’t standard treatments for lowering intraocular pressure in glaucoma. Timolol, delivered topically, provides local action with well-established efficacy for this indication.