| The Effect of Bilateral Superior Oblique Tenotomy on Primary Position Horizontal Alignment. |
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Yong Han Jin, Kyung Rim Sung, Michael S Kook |
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Department of Ophthalmology, College of Medicine, University of Ulsan, Asan Medical Center. |
| 양안 상사근절단술이 정방안위에서의 수평사시각에 미치는 영향 |
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진용한(Yong Han Jin),성경림(Kyung Rim Sung),국문석(Michael Scott Kook) |
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| Abstract |
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To evaluate the effect of superior oblique tenotomy on horizontal deviation at primary position in A-pattern exotropia with bilateral superior oblique overaction.We performed adjustable strabismus surgeries under topical anesthesia in 6 patients with A-pattern exotropia. After adjusting horizontal deviation to orthotropia in primary position by horizontal muscle surgery, we measured angle deviation in up, primary, downgaze position and added bilateral superior oblique tenotomy, and remeasured the angle deviation at same positions. We analyzed the angle deviation at postoperative one day, one month, and three month in comparison with the preoperative value. There were no change of horizontal deviation in primary position in 2 patients, qhile 3 to 8 prism diopter(PD) esotropic shift occurred in 4 patients(average 3.3PD) after bilateral superior oblique tenotomy at last follow-up of 3 month. At 3 month postoperatively, there was a tendency of exotropic shift from esotropia noted at immediate postoperative period. When combined surgeries of superior oblique and horizontal muscle are considered and intraoperative adjustable surgery is not permitted, horizontal muscle surgery can be performed with disregarding the effect of bilateral superior oblique tenotomy on primary position horizontal alignment. |
| Key Words:
Esotropia;Horizontal alignment;Superior oblique tenotomy |
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