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 Criteria
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 Criteri…
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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