Eyelid droop, or ptosis, is a potential adverse effect following botulinum toxin injections in the upper face. This complication arises when the toxin diffuses to and weakens the levator palpebrae superioris muscle, responsible for elevating the upper eyelid. Precise injection technique and thorough understanding of facial anatomy are essential to minimize the risk of this undesirable outcome. For instance, avoiding injections too close to the orbital rim reduces the likelihood of diffusion to the levator muscle.
Mitigating the risk of eyelid droop is paramount for maintaining patient satisfaction and achieving aesthetically pleasing results. Historically, advancements in botulinum toxin application have focused on refining injection protocols to target specific muscles while preserving the function of adjacent structures. Understanding the depth of injection, the volume of toxin administered, and the diffusion characteristics of the product are crucial factors in preventative strategies. The benefits of careful application extend beyond preventing ptosis, encompassing a more natural and balanced overall appearance.