Elevation deficiency after anterior transposition of inferior oblique muscle

Abstract

Objective Through compared the effect of anterior transposition and recession of inferior oblique (IO), to study the security of anterior transposition of the inferior oblique. Methods A retrospective case control study. Compare the ocular elevation and the IO function after anterior transposition versus reces sion of the IO. Results The comparison of elevation and the IO function of anterior transposition versus recession of IO group yielded significant difference at long-term follow-up, P ＜0.001. The deficiency of IO function after surgery had no relationship with the age of surgery, amblyopia, refraction error, accompany horizontal strabismus surgery, the degree of IOOA and oblique angle. In anterior transposition of IO group, the ocular elevation and the IO function had significant difference at long term follow-up versus early follow-up, P ＜0.001, but had no difference at long term follow-up versus intermediate follow-up. Conclusions Anterior transposition of the IO may cause a limitation of elevation and the function oflO deficiency, which may exist continually. Key words: Strabismus; Ocular motility; Recession of inferior oblique; Anterior transposition of inferior oblique