Some cataracts with residual lens sebum after IOL implantation will have posterior cataract, and laser posterior capsulotomy can be performed if necessary. For cataracts found after IOL implantation, lens sebum residue is relatively common in ophthalmology, and its clinical management is relatively simple, without the need for a second incision intraocular surgery, you can choose to laser posterior capsulotomy surgery, the operation is simple and the process is also fast after the operation, you can quickly regain a clear vision. For the relatively early lens cortical residues that do not have much effect on vision, you can choose to observe them temporarily. If the postoperative vision loss again seriously affects the daily life or the corrected vision is not very good, it is recommended to improve the preoperative examination such as slit lamp microscopy and other timely surgical treatments.