Which type of drug would be useful in dilating the pupils for an examination of the retina?
A) alpha-1 receptor inhibitor
B) beta-3 receptor mimic
C) beta-1 receptor mimic
D) muscarinic receptor inhibitor

Question

Quizplus · Accepted Answer

Muscarinic receptor inhibitors such as atropine are commonly used to dilate the pupil for a retinal examination. By blocking the action of acetylcholine at the muscarinic receptors in the iris sphincter muscle, the dilator muscle is free to contract and thus dilate the pupil. This allows for better visualization of the retina during an eye exam.

Which Type of Drug Would Be Useful in Dilating the Pupils