Ace the 2026 Ophthalmic Medications Test – See Your Success Clearly!

Topical beta-blockers lower intraocular pressure mainly by reducing aqueous humor production from the ciliary body. They block beta-adrenergic receptors in the ciliary epithelium, which decreases cyclic AMP and suppresses the secretion of aqueous humor. With less fluid being formed, the pressure inside the eye drops.

This is different from drugs that increase outflow (such as prostaglandin analogs, which widen the uveoscleral pathway) or from mechanisms that rely on stimulating alpha receptors or increasing aqueous humor production. The key idea is production from the ciliary processes is diminished by beta-blockade.