Patient: Description of condition (onset, main symptoms, hospital visited, etc.): 25-year-old female, Marcus-Gunn syndrome symptoms, left upper eyelid drooping at birth, left upper eyelid transient when chewing. 1. can I see you for a registration? 2. can you give some advice? Wang Yue, Ophthalmologist, Tong Ren Hospital, Beijing, China: In patients with transient jaw syndrome, if the ptosis is not obvious, or if the elevation of the eyes is not significant, you can actually observe that surgery is not necessary, unless the appearance is very ugly or the upper eyelid movement is very high when chewing. The mechanism of surgery is to completely disconnect the levator muscle and then use the frontalis muscle to suspend the eyelid and lift it with the force of the frontalis muscle, so that the mobility of the eyelid will be limited and the eye will not close completely, the eyelid will not blink, and so on, because after all, it is better to use the levator muscle that meets the physiological requirements. However, in severe and moderate transient jaw syndrome, this procedure can be considered, but postoperative ptosis may recur, and the levator aponeurosis is not always easy to disconnect, and the disconnected levator aponeurosis sometimes reattaches to the lid, so that the eyelid may have more or less abnormal motion during chewing. The reason for this is that the nerve that lifts the eyelid and the nerve that is responsible for mastication have an abnormal connection and act as a linkage. After frontalis suspension, which is what can happen after ptosis surgery, you can refer to the following for a general idea. Your condition is understood. Suggestion: Click here to refer to my article Possible Problems After Ptosis.