Session: Poster session A

Stereopsis in patients with acute acquired comitant esotropia

Introduction: Acute acquired comitant esotropia (AACE) is presenting with sudden onset large-angle comitant esotropia with diplopia. AACE generally expected good binocular potential after treatment, if it occurs without neurological disease. This study investigated factors affecting postoperative stereopsis in patients with AACE.



Methods: Retrospective medical records review of 40 patients (aged 4-59) who underwent surgery for AACE from January 2017 to August 2023 was performed. Age of onset, refractive error, angle of deviation, duration of esodeviation, presence of diplopia, stereo-acuity, and fusional state were analyzed. Patients were assigned into good stereopsis (40 to 100 arcsec) and lower stereopsis (>100 arcsec) groups. Motor success was defined as alignment within 4 prism diopter (PD) at both near and distance.



Results: 27(70%) patients achieved good stereopsis in near and 19(47.5%) in distance after surgery. Only eleven (27.5%) patients achieved normal 60 arcsec stereopsis in both near and distance. Mean initial esodeviation angle was 28.1±12.2PD at distance and 26.6±12.2PD at near. Mean postoperative follow-up time was 26.1±17.0 (6~64) months. Final mean postoperative angle of deviation was 0.9±2.3PD at distance and 1.7±3.5PD at near. Mean stereo-acuity was improved from 2.8 to 2.3 log arcsec at distant and 2.6 to 2.1 log arcsec at near. Amounts of preoperative near deviation significantly associated good stereopsis in near and distance (p= 0.034, 0.039, respectively).



Conclusions: Age of onset, fusional state, preoperative stereopsis, and duration of esodeviation did not affect to regain normal stereopsis in both near and distance, but amount of near angle of deviation only associated with good stereopsis.