[The effect of superior oblique tucking on the status of ocular torsion].

Objective: To investigate the effect of superior oblique tucking on the status of ocular torsion.

Methods: It was a retrospective case series study. We reviewed the records of 25 patients underwent superior oblique tucking for treatment of superior oblique palsy in Tianjin Eye Hospital from January 2012 to and August 2013, among them, there were 12 patients had undergone inferior oblique myectomy or inferior rectus recession before this operation. All clinical records, including eye movement, vertical deviation, abnormal head position, Bielschowsky test et al were analyzed. Objective cyclotorsion were examined pre-operation, as well as 1, 30 days post-operation with fundus photograph. The photographs were transferred to a computer and then the fovea-disa angle (FDA) was measured by a software for drawing pictures. The difference of the two eyes was compared by the paired t-test, and the difference of the two groups was compared by the one-way analysis of variance.

Results: All patients had no more than 12 PD vertical deviation and significant abnormal head position before the operations. After underwent superior oblique tucking from 6 mm to 10 mm, their vertical deviation were less than 3 PD, and symptom of unacceptable abnormal head position were ameliorated or disappeared. In 25 cases of the monocular eye involvement, FDA was -10.60° ± 4.93° in the affected eyes preoperatively, while it was -9.67° ± 5.47° in the fellow eyes. There was also no statistically significant difference between two eyes (t = 0.54, P = 0.59). The combined FDA in both eyes were -20.27° ± 6.00° and -10.53° ± 8.04°, -10.83° ± 7.38° preoperatively, 1, and 30 days after operation. The comparison of objective ocular cyclotorsion for both eyes showed significant difference pre- and post-operation (F = 14.81, P < 0.01).

Conclusions: Superior oblique tucking can correct ocular excyclodeviation effectively, and simultaneously correct little vertical deviation. It's good to ameliorate abnormal head position.