Objective: To investigate the effect of superior oblique recession on the status of ocular torsion.
Methods: Twenty patients (31 eyes ) underwent superior oblique recession for treatment of superior oblique overacting, 11 cases had both eyes involvement while 9 had monocular.Objective cyclotorsion were examined pre-operation, as well as 1, 30, 90 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.Subjective cyclotorsion were assessed by double Maddox rod test and synoptophore, while the binocular vision function by Bagolini glasses and Titmus.
Results: For 11 cases of the both eyes involvement, preoperation FDA was 9.50° ± 5.12° in the right eyes, 8.23° ± 3.45° in the left eyes, there was not statistically significant between two eyes(t = 1.12, P = 0.29). For 9 cases of the monocular eye involvement, preoperation FDA was 6.55° ± 4.14° in the affected eyes, 6.85° ± 5.08° in the follow eyes, there was also not statistically significant between two eyes (t = 0.13, P = 0.90). To 11 cases of the both eyes involvement, the combined FDA of preoperation and 1, 30, 90 days after operation were 17.74° ± 7.89° and 7.63° ± 4.28°, 6.05° ± 6.11°, 7.33° ± 6.17° respectively. The comparision of objective ocular cyclotorsion for both eyes showed significant difference pre-and post-operation (F = 8.245, P < 0.01) . To 9 cases of the monocular eye involvement, the combined FDA of preoperation and 1, 30, 90 days after operation were 13.40° ± 6.13° and 5.06° ± 3.99°, 3.59° ± 3.47°, 5.07° ± 3.35° respectively. The comparision of objective ocular cyclotorsion showed significant difference pre-and post-operation (F = 9.351, P < 0.01) .Four patients had subjective cyclotorsion, but it's different with objective cyclotorsion before and after surgery.8 patients' binocular vision function were ameliorated after surgery.
Conclusion: Recession of overaction superior oblique muscles can correct ocular incyclodeviation effectively.
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