 Botulinum toxin therapy has been reported to be similarly successful as strabismus surgery for patients with binocular vision and less successful than surgery for those who have no binocular vision.One study found that botulinum toxin therapy had similar long-term success rates for treating infantile esotropia with botulinum toxin A before the age of 12 months as would have been expected from strabismus surgery.Another study reported similar long-term success rates for infantile esotropia treated before 24 months of age by either strabismus surgery or botulinum toxin treatment.