Aim: To study postoperative residual vertical deviation and abnormal head posture (AHP) after surgical treatment for congenital superior oblique palsy ( SOP ).
Method: Children with both SOP and AHP, who underwent extraocular muscle surgery for correction of AHP were recruited. The patients received complete ophthalmic and orthopaedics examinations. Residual AHP was classified according to severity of face turn, head tilt and chin elevation.
Results: 32 children with mean age at operation of 82.6 months were recruited, with mean follow up of 37.9 months. 65.6% patients had a postoperative vertical deviation of less than three prism dioptres. 34.4% patients had resolved (0 degree), 34.4% had mild (0-10 degrees), and 31.3% had significant residual torticollis (greater than 10 degrees). 33.3% of the patients with significant residual torticollis had ocular causes. The mean age at operation for the patients with residual torticollis (95.9 months) was older than those without torticollis (79.9 months) (p=0.018). Residual torticollis was found to be related to sternocleidomastoid tightness (p=0.013).
Conclusion: The success rate for eliminating significant AHP after strabismus surgery for patients with congenital SOP was 68.8%. Early surgery was associated with a better outcome. Association was also found between sternocleidomastoid tightness and AHP. Multidisciplinary approach is recommended in the management of torticollis as ophthalmic and orthopaedic comorbidities can coexist.