What tests should be done before myopia surgery? _Industry information_

The time of myopia surgery is relatively short, but the preoperative inspection time of myopia surgery generally takes 1 to 2 hours, which shows the importance of preoperative surgical inspection. The preoperative examination of myopia surgery is for the sake of safety. For some sequelae of laser treatment of myopia, a large part of the reason is that there is no good preoperative examination. The preoperative examination will check many aspects. Let’s take a look at some of the more important preoperative examination items for myopia surgery. Surgical examination for myopia requires relevant detection and understanding of the patient's eye and physical health. Vision examination, mainly uncorrected vision and corrected vision. Refraction, the accuracy of refraction has a direct impact on myopia surgery, generally using a combination of medical optometry, retinoscopy and subjective optometry, and also taking into account the occupation, age, corneal thickness, etc. of myopic patients. Obtain better diopter and achieve better vision. Intraocular pressure examination, mainly to rule out glaucoma and high intraocular pressure. Corneal topography to examine the morphology of the entire anterior surface of the cornea to rule out the possibility of keratoconus, and to detect postoperative changes in corneal morphology. Corneal thickness measurement, corneal thickness plays an important role in the choice of surgery and the size of the ablation. Furthermore, the measurement of corneal thickness can also make the prediction of surgery more accurate. Anterior segment examination, involving the detection of pupil diameter, as well as cornea, conjunctiva, anterior chamber, lens, anterior vitreous body. Conjunctivitis, keratitis and other diseases were excluded. Pupil examination is to avoid postoperative glare and complications. Fundus examination to exclude retinal tears, detachment, degeneration, hemorrhage and other fundus diseases. The wavefront aberration test is mainly to check the overall aberration of the human eye, and to make individualized surgical plans according to different conditions. Axial measurement, to determine the category of myopia, to monitor the growth of the eye axis. Some people also need to test the accommodation ability of the eyes in order to better use the eyes later in life.