The lens is located in front of the vitreous humor and is biconvex and flexible, and is the refractive interstitial with the ability to regulate. Lens clouding in the eye can be divided into congenital clouding and acquired clouding. Congenital clouding is mostly associated with growth and development, often accompanying patients at birth, and is relatively stable. If it has a significant impact on vision, the patient needs to be seen by an ophthalmologist at the earliest possible time for surgical treatment. Acquired lens clouding is usually related to age, trauma, or a decline in systemic metabolism, etc. In this case, the clouding may be called a cataract. Patients should replace the appropriate IOL according to their needs so that their eyes can see more clearly and no longer blurred. In addition, patients should follow the doctor’s instructions for regular medication and review regularly after surgery for crystal clouding. If symptoms such as eye redness, eye pain and blurred vision occur, they should go to the hospital as soon as possible for examination and take timely treatment measures.