| The Influence of Monocular Occlusion on the Preoperative Ocular Alignment and the Surgical Outcome in Basic Intermittent Exotropia. |
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Yun Young Choi, Soo Ho Cho, Jung Yoon Kwon |
1Department of Ophthalmology, Daegu Fatima Hospital, Korea. eye9407@yahoo.co.kr
2Department of Ophthalmology, College of Medicine, Kyungpook National University, Korea. |
| 기본간헐외사시에서 단안차폐를 통한 사시각 측정이 수술전 사시각 및 수술결과에 미치는 영향 |
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최윤영 ( Choe Yun Yeong ) , 조수호 ( Jo Su Ho ) , 권정윤 ( Kwon Jeong Yun ) |
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| Abstract |
PURPOSE
This study was to evaluate the influence of monocular occlusion on the preoperative ocular alignment and the surgical outcome of basic intermittent exotropia. METHODS: We examined 42 patients with basic intermittent exotropia who were operated and followed for at least 6 months postoperatively from January 2001 to August 2002. In all patients, angle of misalignment measured while the patients fixate on an accommodative target at 6m and 33cm, and after 2 hours of monocular occlusion. The subjects were divided into two groups: Gruop 1-far angle of misalignment did not increase after 2 hours of monocular occlusion, Group 2-far angle of misalignment increased in 3PD or more after 2 hours of monocular occlusion. Group 2 underwent surgery for the increased deviation of far angle. RESULTS: Among 42 patients with basic intermittent exotropia, Group 1 included 27 (64.3%) patients and Group 2 15 (35.7%) patients. In Group 2, the mean ( +/- SD) increase in the angle of exotropia after 2 hours of monocular occlusion was 5.33 ( +/- 2.74)PD. The success rate of surgery was 77.8% (21/27 patients) in Group 1, 93.3% (14/15 patients) in Group 2 at 6 months after surgery and 70.4% (19/27 patients), 93.3% (14/15 patients) at the final visit. There was no statistically significant difference (p> 0.05). CONCLUSIONS: This study showed the significant influence of monocular occlusion on the ocular misalignment before surgery and surgical outcome in basic intermittent exotropia. Angle of misalignment measured after 2 hours or more of monocular occlusion seemed to be meaningful. |
| Key Words:
Basic intermittent exotropia;2 hours of monocular occlusion |
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