Nowadays, excimer laser treatment for myopia has been accepted by more and more people, and many people have gained a new vision of life through the surgery. As the saying goes, some people are happy and some people are sad. Faced with the limitations of laser surgery, those who are highly myopic and have thin corneas can only be turned away in frustration! Mr. Zhu is a pediatrician, 50 years old, 2000 degrees of myopia and astigmatism, his age and myopia are beyond the indications of laser surgery, but he still removed his thick glasses and obtained clear vision through another surgery as he wished, which is ICL implantation. ICL implantation, also known as posterior chamber IOL implantation, or “implantable contact lens”, can be used to correct a wide range of myopia, hyperopia and astigmatism. Currently, many people with high myopia, especially super high myopia (≥800 degrees), cannot undergo excimer laser correction because of insufficient or relatively thin corneal thickness. Unlike laser surgery, ICL does not require the removal or destruction of corneal tissue and does not require post-surgical sutures. It is particularly effective for high myopia, and is considered to be the newest and safest technology for refractive correction instead of LASIK, LASEK and other cutting procedures. ICL is suitable for patients between the ages of 21 and 55. Preferably, they have not had eye surgery and do not have eye diseases such as cataract, glaucoma, or iritis. It is suitable for 300-2300 degrees of myopia, or 300-2000 degrees of hyperopia and 100-400 degrees of astigmatism. After passing a strict pre-surgical examination and preoperative preparation, patients undergo ICL implantation under local anesthesia, which is a simple, quick and small incision procedure. The quality of vision after surgery is good and regression rarely occurs. Since the ICL is implanted inside the eye for a long time, no maintenance is required. The implanted ICL does not bind to any tissue structure and does not move. It has good bio-compatibility and can be placed for a long time, and you will not feel the presence of the ICL inside the eye. If the patient’s vision changes significantly and the ICL worn is no longer suitable, the ICL can be removed or replaced at any time. After the ICL is implanted, patients can still wear frames or contact lenses. The ICL implantation surgeon should be familiar with both the examination and theory of refractive surgery and have rich experience in cataract and other internal eye surgery, with skillful microsurgery and rich practical experience; secondly, there should be strict operating procedures, and its surgical indications, although increased in scope compared to excimer laser surgery, still require strict examinations such as Orbscan II, corneal endothelioscopy, dilated pupil, direct fundus examination, etc. Direct fundus examination and so on. Otherwise, it may be difficult to achieve the desired surgical results.