Plastic surgery experts said: Apart from the doctor's operation and postoperative conditioning, the patient's own condition is also an important factor affecting the success of double eyelid surgery. Eight reasons why the double eyelids can't be cut out. 1. The ptosis is caused by the partial or total loss of the function of the levator palpebrae superioris, which can cause eye opening disorder. According to the degree of eyelid covering the pupil, ptosis can be divided into mild, moderate and severe. People with severe ptosis can't do double eyelid surgery, and can only be corrected by operations such as frontalis muscle flap suspension and levator palpebrae superioris muscle shortening. Here, I need to remind you that some people cover their pupils because their eyelids are too loose, which is definitely not ptosis. Don't do surgery to correct ptosis. This situation can be solved by peeling double eyelid surgery. 2. Epicanthus epicanthus is a vertical skin wrinkle in the inner corner of the eye, which is divided into light, moderate and severe, mainly affecting the formation of double eyelids at the inner corner of the eye. The solution is to open the inner corner of the eye. The satisfaction rate of opening canthus is very low, and scars will be seen in the short term. Not all people are suitable for opening canthus. Only when the epicanthus is heavy and the distance between the two inner canthus is far away is it suitable for canthotomy. Some people have a low nose root, which makes the distance between their eyes too wide. They only need rhinoplasty, and they don't need to open the inner corner of their eyes. 3, swollen eyelids often people with swollen eyelids have the characteristics of thick fat, thick muscle and thick skin. The double eyelids of this kind of eyes are very difficult to do, and doctors need rich experience. Simple fat thickness is the best effect and the best solution. Just remove the excess fat. If the muscles and skin are thick, doctors need to do special treatment during design and operation. 4. Relaxation of the upper eyelid skin will affect the shape of the double eyelids, and severe sagging will affect vision and eyes, which often gives people a feeling of fatigue, especially in the outer third of the upper eyelid. The solution is to remove excess skin, and the effect is very good. Because with the growth of people's age, the skin will relax to varying degrees, so we should not be too conservative when we are doing double eyelid surgery, especially the outer 1/3 part. 5, orbital septum fat or lacrimal gland ptosis The orbital septum fat of the upper eyelid mainly has three groups: inner, middle and outer. If there is too much fat, the eyelids will be swollen and have no spirit. In severe cases, the lateral cellulite will emerge from the orbital septum ptosis, which will aggravate the relaxation of the eyelids. There is sagging and edema on the lateral side of the upper eyelid, so it is necessary to pay attention to the difference between fat and lacrimal gland, and appropriate removal or reduction can be given during the operation. 6, the width of the meibomian is relatively tough, its normal width is about 1mm, and individuals are below 7-8 mm. The width of the tarsal plate is what doctors need to pay attention to before operation, because the width of the tarsal plate determines the maximum limit of the double eyelids, and the design width of the double eyelids should generally not exceed the upper edge of the tarsal plate. Many people's difficulty in opening eyes after operation is caused by the double eyelid line exceeding the upper edge of eyelid plate or the adhesion of levator palpebrae superioris muscle. 7, short eye fissure Generally speaking, people with short eye fissure are not suitable for double eyelid surgery, and people with relatively short eye fissure cannot make their double eyelids too wide. Many people think of opening the inner and outer corners of the eyes in view of the short eye fissure. In fact, opening the corners of the eyes will have a certain retraction, and it may also deform the eyes, which is not suitable for all people. Because there is no extra skin available in the corner of the eye that has been opened, most of them can't be repaired, which is an operation with no retreat. I hope to be careful before operation. 8. Eyebrow-eye spacing From the aesthetic standard, this is considered from the perspective of overall harmonious beauty, and at the same time, it is necessary to take into account the coordination of eyebrow shape, eye shape and the whole face. Eyebrow-eye spacing Individual middle-aged and elderly people suffer from drooping eyebrows due to facial skin relaxation, and the excessive skin relaxation of the upper eyelid affects the shape of double eyelids, forming what we often call "triangular eyes". If peeling double eyelid surgery is used to correct it, it will only aggravate the eyebrow droop, further narrow the eyebrow-eye distance, and also destroy the transitional relationship of the upper eyelid skin thickening from bottom to top, making the upper layer of double eyelid more bloated. Therefore, those with drooping eyebrows should first correct the problem of drooping eyebrows by eyebrow lifting surgery or forehead rhytidectomy, and restore the normal eyebrow-eye distance to improve the problem of double eyelid.