| Effect of Vertical Displacement of Bilateral Horizontal Muscles in AV Syndrome. |
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Hae Ran Chang, Joon Mo Kim |
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Department of Ophthalmology, Kangbuk Samsung Hospital, College of Medicine, Sungkyunkwan University. |
| AV 형 사시에서 양안 수평근의 수직이전 분량에 따른 효과 |
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장혜란(Hae Ran Chang),김준모(Joon Mo Kim) |
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| Abstract |
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We reviewed 20 cases for the surgical effect of the vertical transposition of the horizontal rectus muscle for AV syndrome without significant oblique dysfuction. We performed vertical tranposition of the horizontal rectus muscle with standard recession and resection procedure and followed up at least six months. Sixteen cases were V syndrome and four cases were A syndrome. Medial rectus was moved toward the apex of the A or V, and the lateral rectus was moved to the opposite side of the apex of the A or V. The amount of transposition was adjusted according to the amount of vertical incomitance. If the vertical incomitance was 10delta, 15delta, 20deltaand 25delta, vertical transposition of rectus muscle was 1/4 TW[tendon width], 1/2 TW, 3/4 TW amd 1 TW, respectively. We achieved an average of 12.9deltareduction by 1/4 TW transposition, 14.4deltareduction by 1/2 TW transposition, 13.3delta reduction by 3/4 TW transposition, 19.0deltareduction by 1 TW transposition. We also achieved an average of 5.2delta/mm effect by 1/4 TW transposition, 2.9delta/mm effect by 1/2 TW transposition, 2.4 delta/mm effect by 3/4 TW transposition, 1.9delta/mm effect by 1 TW transposition. The vertical transposition of the horizontal rectus muscle for AV syndrome without significant oblique dysfuction showed good result and the amount of correction per mm of vertical transposition seemed to decrease as the amount of transposition increased, even though the total amount of correction showed a trend toward increasing [Fig.1, 2]. |
| Key Words:
AV syndrome;Vertical transposition of horizontal rectus muscle |
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