Anatomical Evaluations of The Location and Insertion Shape of Horizontal Rectus Muscle.

Lee, Young Chun; Yang, Suck Woo

Original Article

Journal of the Korean Ophthalmological Society 1995;36(8):1357-1362.
Published online August 1, 1995.

Anatomical Evaluations of The Location and Insertion Shape of Horizontal Rectus Muscle.

Young Chun Lee, Suck Woo Yang

Department of Ophthalmology, Kangnam St. Mary's Hospital, Catholic University, Medical College, Seoul, Korea.

수평직근 부착부위의 위치 및 모양에 관한 해부학적 고찰

이영춘(Young Chun Lee),양석우(Suck Woo Yang)

Abstract

We examined the variations in the limbus-insertion distance, the width and the insertion shape of 260 horizontal recti muscles in 137 strabismic patients, and evaluated the relationship between insertion shape and postoperative results. The average limbus-insertion distance of medial rectus muscle was 4.72 +/- 0.49mm and that of lateral rectus muscle was 6.29 +/- 0.58mm. The width of medial rectus and lateral rectus mascle was 9.84 +/- 0.83mm and 9.57 +/- 0.84mm. The insertion shapes of horizontal rectus muscle were divided into 5 groups, straight, oblique type I and II, concave and convex patterns. According to insertion shape, insertion shape of the medial rectus muscle had no statistic difference in esotropia and exotropia(P=0.179), but in case of the lateral rectus muscle, it was staistically significant in both exotropia and esotropia(P=0.036). When the deviation angle was larger than 40 delta, the length of limbus width was statistically significant in lateral rectus muscle(P=0.018). The insertion shape divided into straight and non-straight pattern was statistically insignificant on postoperative success rate.

Key Words: Horizontal recus muscle;Limbus-insertion distance;Insertion shape