What is the purpose of cycloplegic agents?

Cycloplegic agents primarily serve the purpose of paralyzing accommodation in the eye. Accommodation refers to the eye's ability to change focus between near and far objects, a function predominantly managed by the ciliary muscle and the lens. When cycloplegic agents are administered, they temporarily inhibit the action of this muscle, leading to a state of temporary paralysis.

This feature is particularly beneficial during certain ocular examinations and procedures, as it allows for a more accurate assessment of refractive error without the interference of accommodation. It can also help to relieve symptoms of eye strain in conditions where excessive accommodation is involved.

While cycloplegic agents do often cause pupil dilation, their primary intended effect is not simply to dilate but rather to inhibit the process of accommodation, supporting the rationale behind their use in visual assessments.