Purpose: To compare the efficacy of three types of treatment for strabismus: surgery, unilateral and bilateral botulinum toxin injections. Methods: To compose groups I and II, a prospective study was carried out observing the pretreatment measurement of the deviation, repeated after 7, 30 and 90 days after the injection. To compose group III, a retrospective study was carried out. Results: The percentage of horizontal deviation correction for distance, in 3 months, was: group I = 50.9%; group II = 55.8%, and group III = 77.0%; for near, 48.6%, 49.2% and 72.8% respectively.The therapeutic success rate, defined as residual deviation of 10 PD (prism diopter) or less, was: group I = 57.1%; group II = 68.4% and group III = 72.4%.Conclusions: There were no statisticaly significant differences between the percentage of deviation correction and success rate between the three types of treatment studied.
Strabismus; Botulinum toxin type A; Case report
