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Comparing homatropine and atropine in pediatric cycloplegic refractions

Bhavin M Shah1, Pradeep Sharma, Vimla Menon

  • 1Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.

Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
|July 23, 2011
PubMed

Insights

Atropine provides more consistent cycloplegic refraction results in children than homatropine. A new formula may allow homatropine to achieve atropine-like outcomes in pediatric eye exams.

Area of Science:

  • Ophthalmology
  • Pediatric Optometry
  • Pharmacology

Background:

  • Accurate refractive error assessment in children is crucial for timely intervention.
  • Cycloplegic agents are essential for relaxing accommodation during pediatric eye exams.
  • Homatropine and atropine are commonly used cycloplegic agents with differing efficacy profiles.

Purpose of the Study:

  • To compare the cycloplegic efficacy of homatropine and atropine in pediatric refractions.
  • To develop a regression formula for predicting refraction findings using both agents.

Main Methods:

  • Pediatric participants (4-10 years) with refractive error underwent cycloplegic refraction.
  • Two percent homatropine and 1% atropine were administered.
  • Refractive data analyzed using power vector analysis, including spherical equivalent and astigmatic components.

Main Results:

  • Atropine revealed significantly greater hyperopic spherical equivalent in hypermetropic children compared to homatropine.
  • Atropine demonstrated a significantly greater overall blur strength than homatropine.
  • Homatropine resulted in significantly greater residual accommodation than atropine.

Conclusions:

  • Atropine offers more consistent cycloplegic refraction results in pediatric patients.
  • While atropine has a slower onset and longer duration, a derived regression formula may enable homatropine to achieve similar outcomes.
  • This formula could enhance the clinical utility of homatropine in pediatric eye care.
Abstract

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