Appendix
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Ophthalmology/Optometry

Cycloplegic and Noncycloplegic Refraction

The most common cause of visual disability worldwide is refractive errors, and their prompt diagnosis and timely treatment are essential in preventing irreversible visual sequelae, such as amblyopia. Refraction can be divided into cycloplegic and non-cycloplegic. Cycloplegic refraction is the gold standard investigation in children and adults with active accommodation as it paralyzes ciliary muscle and prevents over minus correction because of the accommodative component. The disadvantage can be

v1 · Reviewed Nov 8, 2026 by Automated Clinical Reviewer (Strict Verbatim v1)
  • prompt diagnosis and timely treatment are essential in preventing irreversible visual sequelae, such as amblyopia.
  • The underlying clinical conditions leading to decreased vision can potentially threaten long-term sequelae.
  • Pediatric patients below 13 to 14 years of age presenting with defective vision and having underlying refractive error should be subjected to cycloplegic refraction.
  • Cycloplegic refraction is the gold standard investigation in children and adults with active accommodation
  • Non-cycloplegic refraction includes retinoscopy, auto-refraction, and objective and subjective refraction
  • Cycloplegics cause temporary paralysis of ciliary muscles allowing the determination of total refractive errors.
  • Retinoscopy is performed in dim room illumination.
  • The patient should be seated at a distance of 1 meter from the examiner.
  • No movement of red reflex indicates myopia of 1 diopter (D)
  • The movement of red reflex along the direction of the retinoscope indicates either emmetropia or hypermetropia, or myopia of less than 1 D
  • The movement of the red reflex against the direction of the retinoscope implies myopia of more than 1 D.
  • Cycloplegic drugs are often used to evaluate patients for underlying refractive errors.
  • Cycloplegic drugs are the anticholinergic agents that block acetylcholine's muscarinic action in ciliary muscle receptors.
  • Cycloplegics are contraindicated in patients with the shallow anterior chamber, close angle-closure glaucoma, history of allergy or hypersensitivity to any component of drugs, and systemic anticholinergic drugs receiver.
  • Atropine is contraindicated in patients with primary angle glaucoma or narrow anterior chambers.
  • It is also contraindicated among those with hypersensitivity to any preparation components.
  • Tropicamide is contraindicated in angle-closure glaucoma and hypersensitivity to the drug.
  • Atropine gets absorbed systemically through the lacrimal sac and thus should be avoided in children as far as possible.
  • It is advisable to compress the lacrimal sac for a minute after topical application to prevent systemic absorption.
  • Homatropine can rarely have side effects, including incoherent speech, hallucinations, disorientation, psychosis, and visual disturbances.
  • Cyclopentolate is rarely associated with side effects like lacrimation and blurred vision.
  • As accommodation is lost due to cycloplegia, the patient will complain of blurred vision, photophobia, and difficulty focusing near objects.
  • The patient must rest for at least 3 to 6 hours until accommodation reverses.
  • Sometimes the cycloplegic refraction of the patient doesn't match with that of subjective refraction or non-cycloplegic refraction.
  • Hence, post mydriatic test should be done in these cases before the final spectacle prescription.
  • The nursing team also helps in counseling and procuring spectacle for the patients in cases of refractive error.
  • The nursing and the allied staff help monitor the progress of cycloplegic refraction by instilling cycloplegic drugs at regular intervals and assessing the pupillary dilatation.
  • review
    Cycloplegic and Noncycloplegic Refraction. StatPearls [Internet] — Kirandeep Kaur, Bharat Gurnani — StatPearls Publishing, 2023

Decision support only. Verify against local protocols and current labeling. Source: www.ncbi.nlm.nih.gov