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Related Experiment Videos

Ocular deviation following excimer laser photorefractive keratectomy

N Mandava1, E D Donnenfeld, P L Owens

  • 1Department of Ophthalmology, Manhattan Eye, Ear, & Throat Hospital, New York, New York 10021, USA.

Journal of Cataract and Refractive Surgery
|May 1, 1996
PubMed
Summary

Ocular deviation and double vision developed after excimer laser photorefractive keratectomy due to fusion breakdown. A cover test is recommended for refractive surgery candidates to detect significant phorias.

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Binocular Vision

Background:

  • Excimer laser photorefractive keratectomy (PRK) is a common refractive surgery procedure.
  • Maintaining binocular fusion is crucial for comfortable single vision.

Observation:

  • A case of ocular deviation and diplopia (double vision) is presented.
  • Symptoms developed nine months post-monocular PRK.
  • The decompensation was attributed to a breakdown of fusional reserves at distance.

Findings:

  • Monocular PRK can lead to decompensation of pre-existing or induced phorias.
  • Distance fusion breakdown is a potential complication following refractive surgery.
  • The cover test effectively identifies latent eye deviations (phorias).

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Implications:

  • Pre-operative screening for phorias using a cover test is essential for refractive surgery candidates.
  • Identifying patients at risk for decompensation can prevent post-operative diplopia.
  • This case highlights the importance of assessing binocular vision status before refractive surgery.