The first thing that patients need to be told is that the safest method of vision correction is still to wear frame glasses, if conditions permit. However, for highly myopic patients, especially those with more than 1000 degrees of myopia, frame glasses do not compare to ICL implants in terms of visual quality, comfort, and convenience. The most common complications of ICL are as follows: 1. Cataracts Because the ICL lens itself is very close to the natural lens, the operation itself, the interference with the natural lens, and the risk of the ICL procedure, can all be very serious. Since the ICL lens itself is very close to the natural lens, the surgical operation itself and the interference with the natural lens may lead to clouding of the own lens resulting in cataract. The literature reports an incidence of about 1%-3%. 2. Glaucoma The ICL lens itself prevents the normal drainage of atrial fluid, which is why we need to tap a small hole in the patient’s peripheral iris with a YAG laser before surgery to drain the atrial fluid. In addition, the ICL lens itself causes the anterior chamber to become shallow, so patients with an already shallow anterior chamber are not suitable for ICL implantation, and in general, it is required that the depth of the anterior chamber before surgery should not be less than 2.8 mm. In general, acute IOP elevation within 24 hours after surgery is almost always related to intraoperative viscoelastic retention, which will be relieved after treatment. 3. Pigment seeding The ICL crystal itself can rub against the iris, leading to pigment seeding and causing subsequent problems such as glaucoma. In addition, due to the special nature of high myopia itself, there is a certain probability that its retinal detachment will occur, but it has little to do with ICL surgery. In addition, complications such as bleeding and infection are not unique to ICL surgery itself, as any intraocular surgery carries the risk of bleeding and infection. For ICL surgery, the cataract problem is probably still the main concern. It should be said that the overall results of ICL surgery are very good, as we do see many patients after surgery with vision that is more than 2 lines better than their best preoperative vision with glasses. The purpose of writing about these complications is to inform patients of the possible objectivity of surgical complications in order to provide them with the opportunity to weigh the pros and cons and make the choice that is right for them.