Highlight
- Strabismus surgery significantly reduces hypertropia in patients with sagging eye syndrome (SES) immediately postoperatively.
- Approximately one-quarter of patients develop symptomatic recurrent hypertropia within about two years after surgery.
- Neither patient’s demographic factors nor magnitude of preoperative hypertropia predict recurrence or overcorrection risk.
- Surgical overcorrection events are uncommon and may be misclassified due to compensatory changes in the fellow eye over time.
