Frequent lens replacement is rare. There are several main reasons why the intraocular lens needs to be replaced: The first is the displacement of the intraocular lens. For example, the patient has been injured after surgery and the intraocular lens has moved. It affects vision, so it needs to be replaced or re-fixed. In addition, patients have long-term inflammation after surgery and cannot tolerate intraocular lenses, especially some intraocular lenses whose materials are relatively poor and need to be replaced. Furthermore, if there is a large deviation in the calculation of the power of the intraocular lens, which affects the patient's vision, it needs to be replaced. Nowadays, it is common in clinical practice that children change the intraocular lens when they are relatively young. When the child grows up and his eyeballs develop, the power of the intraocular lens will change. It is no longer suitable. If the deviation is large, the intraocular lens needs to be replaced. There are also cataracts in children. Since the child's immune system is relatively weak, the reaction after the operation is relatively severe, which can easily cause the intraocular lens to shift. In this case, the lens needs to be replaced. And the situation of changing it again and again is really rare. The doctor will decide whether you need to replace your eyes based on the condition of your eyes. Only after weighing the pros and cons can we decide whether to replace them.