In our daily clinical work, we often receive inquiries from our patients and friends, and one of the more frequent questions is: “I have myopia, am I a candidate for femtosecond surgery?” Every time, we have to explain like a repeater. In fact, whether or not you are suitable for femtosecond laser myopia surgery should be considered from the following two aspects: The first is psychological: first of all, you should have the desire to remove your glasses, and at the same time, you should reach an agreement with your family. I often see young people in their 20’s being brought in by their parents for surgery, but they are distracted during the examination and look like they don’t care about themselves. Such patients are certainly not suitable for surgery for the time being, and we will certainly refuse them. Secondly, you should not be too demanding about the expected results of the surgery. In daily life, vision above 0.5 is basically sufficient without glasses, so we usually regard this as the standard for basic removal of glasses after surgery. Of course, most patients achieve better results after surgery, for example, 1.2 or 1.5 after surgery abound. But in general, the degree of recovery after surgery is not only related to the surgery itself, but also often varies depending on the individual’s body type. The second is physiological: After you have decided to undergo the surgery be sure to go to a regular laser myopia treatment eye center and ask your doctor to do a thorough eye exam, which is especially important because everyone has only one pair of eyes. If you have previously worn contact lenses, you must stop wearing them for at least one week (or for rigid keratoplasty lenses such as OK lenses, for example, for at least one month). So why do you need to stop wearing contact lenses before myopia surgery? The reasons are: 1. Discontinuing contact lenses is to normalize the corneal epithelium. Because contact lens wear often makes the cornea hypoxic, and in severe cases even cause corneal epithelial defects. In order to improve corneal hypoxia, especially the damaged corneal epithelium can be restored, which requires 24-48 hours. If the contact lens has caused corneal inflammation, the surgery should be performed only after the corneal inflammation has been completely controlled for one month. 2, to restore the original shape of the cornea, so as not to affect the preoperative refractive error, which in turn affects the accuracy of the surgical correction. Contact lenses have a “shaping” effect, and their long-term wear will more or less affect the shape of the cornea, different types of contact lenses (different materials, different curvatures, and the degree of matching the shape of the cornea), different corneal properties of patients (thickness, texture, hardness, elasticity, etc.), resulting in contact lenses on the shape of the cornea The degree of influence of contact lenses on the shape of the cornea varies, so no generalizations can be made. In general, it is sufficient to stop wearing ordinary contact lenses for one week and rigid keratoplasty lenses (such as OK lenses) for more than one month. Usually, the main parameters of the preoperative examination are: bare eye distance, near vision and corrected distance and near vision, corneal diameter, pupil diameter, intraocular pressure, topography, computerized optometry, dilated pupil optometry, small pupil test, corneal thickness, external eye examination slit lamp and fundus examination. For high myopia, a triple-lens examination is routinely performed, and if necessary, OCT, FFA and other related special examinations are required. Through the above mental and physical preparation, the surgeon can make a comprehensive assessment and tell you whether you are suitable for femtosecond laser myopia surgery.