Phenylephrine and Tropicamide eye drops are a combination medication used in ophthalmology for diagnostic purposes. Here’s some information about Phenylephrine and Tropicamide eye drops:

Phenylephrine: Phenylephrine is a sympathomimetic agent that acts as a vasoconstrictor. In ophthalmology, it is used to dilate the pupil (mydriasis). Phenylephrine works by constricting the blood vessels in the eye, leading to pupil dilation. This dilation allows for better visualization of the back of the eye and facilitates eye examinations.

Tropicamide: Tropicamide is an anticholinergic agent that works by blocking the action of acetylcholine, a neurotransmitter responsible for pupil constriction (miosis). Tropicamide causes pupil dilation (mydriasis) and paralysis of the ciliary muscle, which allows for a wide opening of the pupil and facilitates examination of the retina and optic nerve.