Question:medium
Besides its property of decreasing intraocular pressure, timolol is preferred in the treatment of glaucoma because it?
Besides its property of decreasing intraocular pressure, timolol is preferred in the treatment of glaucoma because it?
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Unlike pilocarpine it leaves the pupil unchanged.
Updated On: Jun 24, 2026
- Produces no miosis
- Possesses membrane stabilizing activity
- Increases outflow of aqueous humor
- Is a selective beta-adrenoceptor blocker
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The Correct Option is A
Solution and Explanation
Step 1: Timolol controls glaucoma by suppressing aqueous secretion at the ciliary epithelium through beta blockade, thereby cutting intraocular pressure.
Step 2: The question asks for its extra clinical edge over miotics like pilocarpine. Because it acts on secretion rather than on the iris muscle, it leaves the pupil unchanged - no miosis. That spares the patient pupillary fluctuation, drug-induced myopia and painful ciliary spasm, with simpler once or twice daily dosing.
Step 3: Reject the others - it lowers production rather than boosting outflow, it is non-selective rather than beta-1 selective, and its membrane-stabilizing activity is incidental and not the reason for preference.
\[\boxed{\text{Produces no miosis}}\]
Step 2: The question asks for its extra clinical edge over miotics like pilocarpine. Because it acts on secretion rather than on the iris muscle, it leaves the pupil unchanged - no miosis. That spares the patient pupillary fluctuation, drug-induced myopia and painful ciliary spasm, with simpler once or twice daily dosing.
Step 3: Reject the others - it lowers production rather than boosting outflow, it is non-selective rather than beta-1 selective, and its membrane-stabilizing activity is incidental and not the reason for preference.
\[\boxed{\text{Produces no miosis}}\]
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