Palpebral Ptosis The most important point to pay attention to in the treatment of glabellar frowning eyebrows is eyelid ptosis. This symptom m. m. of the toxin injected into the corrugator supercili through the orbital septum. It occurs when it spreads to the levator palpebrae superioris, causing partial paralysis of this muscle. The physician's experience and injection technique are vital to prevent eyelid ptosis. However, if eyelid ptosis develops, your physician will choose the most appropriate treatment for you.