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

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