| Comparison of Surgical Results between Bilateral and Unilateral Lateral Rectus Recession in 20~25 Prism Diopters Intermittent Exotropia. |
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Hyung Jin Cho, Yang Rae Ma, Yeoung Geol Park |
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Department of Ophthalmology, Chonnam University Medical School, Kwangju, Korea. ygpark@chonnam.ac.kr |
| 20~25프리즘디옵터의 간헐외사시에서 단안 외직근후전술과 양안 외직근후전술의 비교 |
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조형진 ( Hyung Jin Cho ) , 마양래 ( Yang Rae Ma ) , 박영걸 ( Yeoung Geol Park ) |
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| Abstract |
PURPOSE
To compare the postoperative results of unilateral lateral rectus recession with bilateral lateral rectus recession between 20 prism diopters (PD) and 25 PD intermittent exotropia for basic type. METHODS: We analyzed retrospectively the data of 27 patients underwent unilateral lateral rectus recession and 38 patients underwent bilateral lateral rectus recession with 20 PD and 25 PD intermittent exotropia for basic type from June 1996 to May 2000 at the Department of Ophthalmology of Chonnam National University Hospital. RESULTS: There were 10 cases (37.0%) in unilateral group and 8 cases (21.1%) in bilateral group showing undercorrection in the amount of deviation more than 10 PD and 2 cases (5.3%) in bilateral group showing overcorrection in the amount of deviation more than 10 PD, and there was no overcorrection in unilateral group. There was a tendency of recurrence of exotropia during the first postoperative month, but the alignment after 1 month postoperative was not much different from the alignment at the last follow-up. The mean amount of correction after surgery was 13.78+/-7.65 PD (Mean+/-SD) in unilateral group and 20.32+/-8.37 PD (Mean+/-SD) in bilateral group (P=0.002). Success rate was 73.6% in bilateral group, better than 63.0% in unilateral group although there was no statistically significant difference (p>0.05). CONCLUSIONS: The undercorrection rate of bilateral lateral rectus recession is less than that of unilateral lateral rectus recession and more satisfactory surgical outcome was obtained in bilateral lateral rectus recession; therefore bilateral lateral rectus recession can lead to good result in 20~25 PD intermittent exotropia for basic type. |
| Key Words:
Bilateral lateral rectus recession;Intermittent exotropia;Unilateral lateral rectus recession |
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