Predictive factors of surgical outcome in oculomotor nerve palsy

PurposeTo investigate the outcomes and predictive factors of surgical treatment of oculomotor nerve palsy.MethodsRecords of patients requiring eye muscle surgery for oculomotor nerve palsy in our institution were retrospectively reviewed. Age, sex, etiology, deviation, completeness of involvement, time between onset and surgery, botulinum toxin treatment, and number of surgical procedures were recorded as potential predictive factors. Muscle function, presence of diplopia, and torticollis were also recorded. The main outcome measure was motor function. Secondary outcome measures were presence of diplopia, torticollis, and limitation of muscle function.ResultsSurgery was required in 22 patients, of whom motor success was obtained in 14 (63.6%). Frequency of diplopia and torticollis were significantly reduced by surgery. After multivariate regression analysis, longer time between onset and surgery (p = 0.03) and larger initial deviation (p = 0.05) were significantly associated with poorer postsurgical results in terms of motor function.ConclusionsLonger time from onset to surgery and larger eye deviation are negative prognostic factors of postsurgical motor success for oculomotor nerve palsy.