cycloplegia

Full Definition

Cycloplegia is the pharmacological paralysis of the ciliary muscle, which controls the shape of the lens for focusing. This paralysis prevents accommodation and allows for accurate measurement of refractive errors, particularly in children who may have active accommodation that masks true refractive status. Common cycloplegic agents include atropine, homatropine, and cyclopentolate. The effects are temporary but may last several hours to days depending on the agent used.

Usage

Usage note: Document the specific cycloplegic agent used and timing of measurements.

In Context

• "Cycloplegia was achieved with cyclopentolate 1% prior to refraction." — Examination protocol
• "The true hyperopia was revealed only after complete cycloplegia." — Refractive assessment report