With the development of society, double eyelid surgery has become more and more recognized by everyone. There are many candidates who choose to do eye surgery in order to improve their situation, but have consulted will find that the doctor gave advice that they are not suitable for double eyelid surgery, but more suitable for ptosis surgery, so what is the specific ptosis surgery? There are two types of ptosis: congenital and acquired. Congenital ptosis is mostly due to incomplete development of the levator muscle itself, or incomplete function of the motor nerve that governs the levator muscle, which is unable to innervate the upper lid movement. Acquired ptosis There are various causes of acquired ptosis, including the weakening or loss of function of the levator muscle, various causes of ocular neuropathy and increased upper eyelid weight, and in some older adults, myogenic ptosis due to laxity of the levator tendon membrane. There are more than 100 surgical procedures for ptosis, but there are three main types: levator shortening, frontalis suspension, and superior rectus suspension levator shortening is an external approach that removes the excess levator muscle through a skin incision, while also creating a stable lid. The frontalis suspension uses the frontalis muscle instead of the levator muscle as the driving force to lift the upper eyelid, and the surgery can also create a heavy eyelid structure at the same time. Because of the complications of possible diplopia or strabismus, superior rectus suspension is now rarely used. Why do some people have incomplete closure and show white after ptosis surgery? The upper eyelid is unable to relax and close with the lower lid margin due to artificial shortening of the levator muscle or using the power of the frontalis muscle to open and close the eye. This is usually most noticeable after moderate to severe ptosis correction and will generally improve significantly in 1-3 months of post-operative care. If there is no improvement in the long term and the closure remains incomplete, this is mainly because the ptosis correction surgery does not allow the function of the levator muscle to be restored and the upper lid cannot be closed well after lifting it with the help of other forces, which is usually due to overcorrection. Therefore, it is best to have ptosis surgery done by a doctor with extensive clinical experience at a regular medical institution for the best protection of your health and beauty.