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Prism Adaptation in Symptomatic Esophoria - Effect of Shorter Time Intervals and Surgical Outcomes Based on Prism Adaptation

RecruitingNAAges 18 Years - 65 YearsAllCopenhagen University Hospital, Rigshospitalet
NCT06729710 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

This study is a prospective randomized study aiming to investigate the effect of prism adaptation before surgery for symptomatic esophoria on the number of reoperations, the occurrence of over- and under-correction after the first surgery, and symptom resolution. Additionally, we aim to define the optimal duration of prism adaptation.

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📋 Eligibility rules (as published)
Inclusion Criteria: Patients with symptomatic esophoria who meet one or more of the following criteria: * Double vision * Asthenopia (eye strain) * Headaches related to esophoria * Worsening of symptoms during fatigue, sleep deprivation, reading, illness, or alcohol consumption. Exclusion Criteria: * Age between 18 and 65 years at date of inclusion. * Accommodative esotropia or esophoria * Myopia exceeding 10 diopters in the most myopic meridian * Treatment with botulinum toxin in an eye muscle within four months prior to inclusion * Inability to undergo reliable orthoptic measurements or prism adaptation * Previous strabismus surgery * Pregnancy or breastfeeding within 12 months prior to inclusion * Myogenic disorders (including Myasthenia Gravis) * Restrictive strabismus (including previous eye muscle trauma or Graves' orbitopathy) * Eye muscle paresis * Maximum prism-adapted deviation angle \>40 prism diopters (PD) in any gaze direction for distance * Maximum prism-adapted deviation angle with ≥20 PD difference between near and distance measurements
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What it tests

  • Prism adaptation test
  • other
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Where

1 site
Rigshospitalet
Copenhagen, Denmark
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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