Abstract

Background: Refractive errors are an important common cause of visual disturbance worldwide. Symptoms related to refractive errors are quite disturbing and may even disrupt the normal lifestyle of individuals. The evaluation of these patients can be occasionally aided by topical agents called cycloplegic drugs. Thus refraction can be broadly divided into cycloplegic and noncycloplegic refraction. Cycloplegic drugs are often used to evaluate patients for underlying refractive errors. Cycloplegics cause temporary paralysis of ciliary muscles allowing the determination of total refractive errors. Noncycloplegic refraction is performed without any drug administration. It doesn't affect the accommodation and pupil dilatation. The various listed methods of non-cycloplegic refraction are retinoscopy, autorefraction, and objective and subjective refraction.

Description

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