1.Stop wearing soft contact lenses (Dr. Len, etc.) for 1 week, hard contact lenses for 2 weeks, and keratoconus for 4 weeks. 2, if the family is out of town, you can check the anterior chamber depth locally, IOLmaster instrument to measure the ACD value minus the corneal thickness, the difference is greater than 2.8mm, if the conditions are met, come back. 3, the eyes are normal, not red, not itchy, no eye discharge. 4.Myopia can be corrected by 2000 degrees and farsightedness by 1000 degrees. Patients near Beijing ICL preoperative examination: the first time to check the anterior chamber depth, if conditions allow, we will dilate the pupil, optometry, check the fundus, check the corneal endothelial condition, etc., please do not drive, prepare sunglasses; the second review, determine the crystal degree, according to the eye condition for foraminal ICL implantation surgery, cost about 25000 for both eyes. For out-of-town patients, the pre-operative examination and laser treatment will take 2 days, and the custom-made lens and surgery will take, in total, about 10 days. ICL with astigmatism takes longer to customize and costs about 35,000 for both eyes.