What are the potential complications of injecting botulinum toxin near the lateral canthus and orbital rim?

Injecting botulinum toxin near the lateral canthus and orbital rim can lead to complications such as blepharoptosis, diplopia, and lip ptosis. Blepharoptosis may occur if the toxin migrates into the levator muscles of the upper eyelid. Diplopia can result from deep migration into extraocular muscles, and lip ptosis may occur if the toxin affects the lip levator muscles.

When injecting botulinum toxin near the lateral canthus and orbital rim, several complications can arise due to the proximity of critical muscles and structures. Blepharoptosis, or drooping of the upper eyelid, can occur if the toxin migrates into the levator muscles of the upper eyelid. Diplopia, or double vision, may result from deep migration of the toxin into the extraocular muscles. Additionally, injecting deeply and inferiorly near the zygoma can involve the lip levator muscles, leading to complications such as cheek and lip ptosis, smile asymmetry, and potentially oral incompetence. These risks highlight the importance of precise injection techniques and adherence to safety zones to minimize adverse effects.