Purpose: To report characteristics and therapeutic outcomes of repeat surgery for concomitant horizontal strabismus in patients with a history of surgery.
Subjects and methods: One hundred and thirty-nine patients (mean age: 37.1±23.7 years) with a history of surgery and who had undergone repeat surgery at Department of Ophthalmology, Hyogo College of Midicine Hospital for concomitant strabismus during a 7-year period starting from 2008 and whose postoperative progress had been followed up for at least 1 month were included in this study. Based on the eye positions before initial and repeat surgery at our department, we classified the patients into four groups: exotropia (XT) prior to the initial surgery and esotropia (ET) prior to repeat surgery (XT/ET group), XT prior to both surgeries (XT/XT group), ET prior to both surgeries (ET/ET group), or ET prior to the initial surgery and XT prior to repeat surgery (ET/XT group). The four groups were then examined for patient characteristics and surgical outcomes.
Results: The mean±standard deviation time up to the repeat surgery at our department was 18.9±17.4 years; this time was significantly longer in the ET/XT group (29.5 years). Furthermore, 18.7% patients had a history of undergoing multiple surgeries. The postoperative eye position was significantly improved by repeat surgery (p<0.0001), and 82.7% patients showed cosmetic healing. Double vision disappeared in 89.3% of patients with preoperative double vision, and the group with XT prior to the initial surgery showed significant improvement with respect to stereoscopic vision.
Conclusions: Repeat surgery for concomitant horizontal strabismus in patients with a history of surgery had improved esthetics and was effective in eliminating double vision. Patients with XT prior to the initial surgery are expected to also show improvement in stereoscopic vision.
Nippon Ganka Gakkai Zasshi (J Jpn Ophthalmol Soc) 122: 503-508, 2018.