In a normal person, the upper lid is located 1-2mm from the corneal limbus when the eyes are level. If the upper lid position is below this limit and the upper lid partially or completely covers the visual axis, it is called ptosis, which not only affects the appearance of the eye, but in severe cases often affects visual function. In addition, patients often use their frontalis muscle to contract or tilt their head to see in order to get rid of the ptosis, resulting in excessive frontal lines and, in severe cases, deformities of the spine. Some doctors and patients believe that reconstructive surgery is the answer to a droopy upper lid, but this is wrong.