The use of botulinum toxin in the management of convergence insufficiency exotropia

Convergence insufficiency is a common condition in which there is a failure to converge for close work, with exotropia at near. Various surgical and nonsurgical treatments have been described, but some patients remain symptomatic despite treatment. The role of botulinum toxin in strabismus management is well established, but its use in the treatment of convergence insufficiency has not been previously...