Abstract:

Objective To analyze the changes and its influence factors of binocular vision in patients with comitant strabismus after strabismus surgery. Design Retrospective case series. Participants 191 patients undergoing strabismus surgeries in Beijing Tongren Hospital from Dec 2013 to Aug 2014 are involved. Methods All patients are categorized into three groups according to the type of strabismus: concomitant esotropia, constant exotropia and intermittent exotropia; into two groups according to surgery age: ≤9 year and ＞9 year. Binocular visual function preoperation, one-month and three-month postoperation was observed. Main Outcome Measures Grade I, II, III binocular function and near stereoacuity. Results Of all 191 cases, 26.7%, 19.4%, 11.0% and 41.9% patients have Grade I, II, III binocular function and near stereoacuity preoperation, which improve to 90.1%, 64.4%, 33.0% and 57.1% one-month postoperation (P＜0.001) and 94.8%, 79.1%, 37.7% and 63.9% three-month postoperation (P＜0.001). Preoperatively, 38.1%, 29.5% and 72.4% patients of intermittent exotropia group have Grade I, II binocular vision and near stereoacuity, which are better than the other two groups (P＜0.01). At three-month postoperation, 93.3%, 48.6% and 87.6% patients of intermittent exotropia group have Grade II, III binocular vision and near stereoacuity, which are better than the other two groups (P＜0.05); 55.8% patients of constant exotropia group have near stereoacuity, which is better than concomitant esotropia group (P＜0.001). In ＞9 year group, 28.1%, 21.9%, 14.6% and 31.3% patients have Grade I, II, III binocular function and near stereoacuity preoperation, which improve to 93.8%, 75.0%, 37.5% and 58.3% three-month postoperation (P＜0.01). Conclusion Strabiusmus surgery is an effective way to rebuild binocular vision. Intermittent exotropia patients have better binocular vision than patients with other types of strabismus. For the elder patients, strabismus surgery should also be performed if necessary.

Key words: strabismus, strabismus surgery, binocular vision, stereoacuity