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Binocular visual field changes after surgery in esotropic amblyopia.

Say Aun Quah1, Stephen B Kaye

  • 1Royal Liverpool University Hospital and Royal Liverpool Childrens Hospital, Liverpool, United Kingdom.

Investigative Ophthalmology & Visual Science
|May 27, 2004
PubMed
Summary

Children with esotropic amblyopia have reduced binocular visual fields (BVF). Prisms can predict BVF improvement after strabismus surgery, aiding surgical planning for better visual outcomes.

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Area of Science:

  • Ophthalmology
  • Pediatric Ophthalmology
  • Strabismus

Background:

  • Esotropic amblyopia in children is associated with visual field deficits.
  • Binocular visual field (BVF) assessment is crucial for understanding visual function in strabismus.

Purpose of the Study:

  • To evaluate binocular visual field (BVF) changes following strabismus surgery in children with large angle esotropia.
  • To determine if preoperative prism correction can predict postoperative BVF improvements.

Main Methods:

  • Goldmann perimetry was used to measure monocular visual field (MVF) and BVF in healthy adults and children.
  • Visual fields were assessed preoperatively and postoperatively (2 and 18 months) in children with esotropic amblyopia, with and without prisms.
  • Correlation between preoperative prism correction and postoperative BVF was analyzed.

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Main Results:

  • Children with esotropic amblyopia showed a significant reduction in BVF compared to normal children.
  • Postoperative BVF significantly improved and was maintained at 18 months.
  • Preoperative BVF measured with a prism strongly correlated with postoperative BVF, indicating predictive value.

Conclusions:

  • Esotropic amblyopia significantly impairs BVF in children.
  • Prism-based preoperative BVF assessment can predict surgical outcomes and potential BVF increase.
  • Some patients may not experience significant BVF improvement if their preoperative BVF is already near normal ranges.