Troubles with BoNT use in ophthalmology arise as a result of toxin diffusion or inadvertent placement into the adjacent muscles. Ptosis on the eyelid is the most common complication of BoNT treatment of strabismus and blepharospasms.23 Though this impact is nearly always short-term and self-resolving, apraclonidine 0.five% (Iopidine) or phenylepher