Which medication is an example of a miotic agent?

A miotic agent is a type of medication that causes constriction of the pupil (miosis) by stimulating the sphincter muscle of the iris. Pilocarpine is a classic example of a miotic agent, commonly used in the treatment of glaucoma and to lower intraocular pressure by allowing aqueous humor to drain more effectively.

When pilocarpine is administered, it activates the muscarinic receptors in the eye, leading to contraction of the iris sphincter muscle, which results in the narrowing of the pupil. This is particularly beneficial for patients with certain types of glaucoma, as it helps to facilitate fluid drainage from the eye and reduce intraocular pressure.

In contrast, other medications listed serve different purposes. For instance, Neo-synephrine is primarily used as a vasoconstrictor for nasal congestion and pupil dilation, Latanoprost is a prostaglandin analogue used to increase aqueous outflow and lower intraocular pressure, and Atropine is an anticholinergic used to dilate the pupils and for various other purposes such as treating bradycardia.