 Today, the injection of botulinum toxin into the muscles that surround the eyes is one of the available options in the management of strabismus.Other options for strabismus management are vision therapy and occlusion therapy, corrective glasses (or contact lenses) and prism glasses, and strabismus surgery.The effects that are due only to the toxin itself (including the side effects) generally wear off within 3 to 4 months.