The Use of Vertical Offsets with Horizontal Strabismus Surgery.

Yoo, Tae Hwan; Han, Sueng Han

Original Article

Journal of the Korean Ophthalmological Society 1999;40(1):237-241.
Published online January 1, 1999.

The Use of Vertical Offsets with Horizontal Strabismus Surgery.

¹The Institute of Vision Reaearch, Yonsei University College of Medicine.
²Department of Ophthalmology, Young-Dong Severance Hospital, Yonsei University College of Medicine.

수평 사시와 동반된 수직 사시에서 수평근의 수직 이동에 의한 수직 사시의 교정

유태환(Tae Hwan Yoo),한승한(Seung Han Han)

Abstract

Vertical deviation may sometimes coexit with a large horizontal strabismus. If the vertical component is small and comitant, it may be treated by vertical displacement of the horizontal rectus insertions during a monocular recession-resection procedure. A series of 17 patients had vertical displacement of horizontal rectus muscle insertion monocularly combined with recession-resection surgery. Using a surgical plan of 1mm displacement of both medial and lateral rectus insertion to correct each prism diopter of vertical deviation, 12 patients had no residual vertical strabismus. Minimum follow-up period was 3 months. The linear correlation equation between the amount of corrected vertical strabismic angle and that of vertical displacement of medial and lateral rectus muscle is Y=0.67X+0.22(Y=Prism diopter of correction by vertical displacement, X=millimeter of vertical displacement of medial and lateral rectus muscle). These surgical results showed unsatisfactory effect on vertical deviation of more than 6 prism diopters.

Key Words: Comitant strabismus;Displacement;Vertical