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Abstract Purpose: This study aimed to evaluate etiological factors, changes in alignment angle post-surgery, and binocular vision function improvement in Japanese adults with esotropia. Methods: This retrospective study included 105 patients with esotropia who underwent surgery at our hospital. We reviewed the medical records to determine causes of esotropia; patient motivation for surgery; changes in alignment angle post-surgery; improvement in binocular vision function; and correlation between the operated muscle length and corrected eye alignment angle. The alternate prism cover test was performed to assess the angle of misalignment. Binocular vision function was evaluated using the Titmus Stereo Test, major amblyoscope, Bagolini striated lenses test, and afterimage test. One-to-four muscle surgery, involving medial rectus muscle recession or lateral rectus muscle resection, was performed. Results: The etiologies included acquired progressive esotropia with myopia (n=51); congenital esotropia (n=6); partial accommodative esotropia (n=5); cerebral infarction or cerebral breeding (n=5); sagging eye syndrome (SES; n=5); brain tumors (n=3); sensory esotropia (n=2); consecutive esotropia after exotropia surgery (n=2); face trauma (n=1); Duane syndrome (n=1); and unknown origin (n=24). Eye alignment improved in all patients. However, four patients needed a second operation. Binocular vision function improved in patients with acquired progressive esotropia with myopia; partial accommodative esotropia; cerebral infarction or cerebral breeding; SES; and brain tumors. Binocular vision function was unchanged in patients with sensory and congenital esotropia. Conclusion: Esotropia surgery in adults could lead to improved eye alignment and binocular vision function. However, patients with sensory esotropia and congenital esotropia were unable to acquire binocular vision function.
Akiko Yokoyama (Wed,) studied this question.