Analysis of surgical treatment for V-style exotropia

Abstract

Objective To study the surgical methods of V-style exotropia and outcomes. Methods Medical records of 76 patients with V-style exotropia who received surgical treatment from Janu-ary 2006 to December 2014 in our hospital were analyzed. There were 40 males and 32 females with an average of 23.5 years(ranged 12-35 years). The follow-up period was from 6 months to 5 years. Twelve patients had binocular vision function examined by synoptophore preoperatively. According to whether the oblique abnormality and the degree of V syndrome, two surgical methods were chosen. Disinsertion of the inferior oblique muscle combined with vertical displacement and incline of rectus insertion point were performed in patients with oblique abnormality. Displacement and incline of the horizontal muscle insertion was performed in patients without oblique abnormality. Results Two surgical methods were both achieved satisfactory results. Disinsertion of the inferior oblique muscle combined with vertical displacement and incline of rectus insertion point apply for V-style exotropia with inferior oblique overaction. Displacement and incline of the horizontal muscle insertion apply for V-style exotropia without inferior oblique overaction. After surgery, orthophoria of the primary eye position in 68 patients, disappearance of V-pattern in 64 patients, and 32 patients had obtained binocular vision. Conclusions A-V syndrome is a subtype of horizontal strabismus. V-style exotropia is a common type of strabismus. Vertical muscle dysfunction is the major cause. Different operation modes can be selected according to the cause of the disease. The eye position could be corrected and binocular visual function could be established after surgery. Key words: V-style exotropia; Vertical displacement of lateral rectus; Inclination of lateral rectus