Skew transposition of vertical rectus muscles for excyclovertical deviation.

Purpose: The authors established a surgical treatment for excyclovertical strabismus in which either the inferior rectus muscle or the superior rectus muscle was transposed diagonally. The effects and the safety of the procedure, called skew transposition, were studied.

Methods: Eighteen operations using local anesthesia with eye drops were performed on 17 cases, including 10 with superior oblique palsy.