Beta blockers allow for a ______% IOP reduction.

• A. 10%
• B. 25%
• C. 15%
• D. 5%

Answer: (B)

Beta blockers lower intraocular pressure by reducing aqueous humor production in the ciliary body through blocking beta-adrenergic receptors. This mechanism typically yields about a quarter of the baseline IOP being reduced on average. In practice, a common, reliable reduction is around 25%, though the exact amount can vary with baseline IOP and individual response. So among the given options, about 25% best reflects the typical effect seen with beta-blocker therapy. Smaller reductions (like 5% or 10%) would be less representative of their usual impact, and while reductions around 15% can occur in some patients, 25% is the standard expectation used in teaching and clinical planning.