Which of the following is a plausible side effect of beta blockers used for glaucoma?

• A. Ocular irritation
• B. Bradycardia
• C. Tachycardia
• D. Hypertension

Answer: (B)

The main idea is that glaucoma beta-blocker medications, while applied to the eye, can be absorbed into the bloodstream and affect systems beyond the eye. These drugs block beta receptors in the ciliary body to reduce aqueous humor production, but some amount can enter circulation and slow the heart. That makes bradycardia a plausible systemic side effect. Tachycardia or hypertension would not align with the drug’s action, since beta-blockade tends to reduce heart rate and often lower blood pressure rather than raise them. Ocular irritation can occur with topical eye drops, but the question centers on a systemic effect most characteristic of these medications.