ICL surgery is suitable for people: 1. The change of spectacle prescription within 1 year does not exceed 0.5D. 2. The age is between 21 and 50, the refractive error is stable in recent years, and the corrected vision is good. 3.The correction range of farsightedness is 100-1000 degrees, the correction range of myopia is 200-2300 degrees, and the range of astigmatism is 100-600 degrees. 4, anterior chamber depth ≥ 2.8mm. 5, corneal endothelial cell density ≥ 2500 cells/mm2. 5, no high intraocular pressure and glaucoma, no history of uveitis, no cataract. 6.Patients with dry eye or thin corneas not suitable for excimer laser keratomileusis. Precautions after ICL lens implantation: 1.Post-operative medication should be administered according to medical advice and reviewed regularly. 2. Avoid squeezing the eye within 1 week after surgery, prohibit lifting and carrying heavy objects within 2 weeks after surgery, and do not rub the eye with force within 3 months. 3, 1 week after surgery, the eye should be protected from water, such as sweat or face wash water, etc. Avoid eye makeup and swimming within 1 month. 4. Avoid using computer, TV and reading books and newspapers for a long time within 1 week after surgery, use eyes scientifically within 1 month and pay attention to rest. 5.Avoid spicy and stimulating food within 1 month after surgery. 6, 1 month after surgery, regular exercise is not restricted, within 3 months, pay attention to avoid strong confrontation or sports that have potential harm to the eye. 7.Avoid trauma, prevent the eyes from direct collision after surgery, and choose to wear sunglasses or polarized glasses for protection when going out in windy and sandy conditions or for people who are sensitive to light.