The difference between eye opening and no eye opening is mainly that the adaptable people are different and need to follow the doctor’s instructions reasonably. Usually, eye opening refers to inner and outer canthoplasty, which mainly corrects and enlarges the inner and outer corners of the eyes, thus removing the redness of the inner canthus and lengthening the horizontal length of the eyelid to achieve the effect of enlarging the eyes. The surgery is mainly used for patients with inner canthus and congenital microphthalmia in the early stage, but with the development of medical cosmetology and the enhancement of the requirements of the beauty lovers, the surgery can also be used for the normal people who are in pursuit of big eyes. However, the surgery is not suitable for all people. Generally, the surgery is not suitable for patients with serious liver, kidney and cardio-cerebral diseases, and it is also not suitable for patients with psychological disorders, mental disorders, pregnant women, obvious keloidal physique and patients with excessive or unrealistic requirements. For those who have protruding or concave eyeballs or retracted eyelids, the procedure should be handled with caution. Patients are advised to choose to undergo eye opening according to their own situation and after a reasonable assessment by the doctor, which can mainly enlarge the eyes.