There are two main common misconceptions about the efficacy of cataract surgery. Misconception 1: Since posterior cataracts can still occur after cataract surgery, why bother to undergo cataract surgery? Post-operative cataracts occur in about 10% of patients after surgery, when the capsule lining the IOL becomes cloudy again after surgery and affects vision. But even if this happens, don’t worry, just get laser treatment on an outpatient basis and the problem will be completely solved without having to undergo surgery again. 2: Will all cataract surgery necessarily improve my vision? The eye is like a precision camera, and cataract is like a problem with the lens of the camera, which can be replaced through surgery. But the imaging of a camera is not only related to the lens, but also related to the film and so on. Some elderly people have glaucoma, fundus disease, optic neuropathy and other eye diseases in addition to cataract, just like the film of a camera. For such patients, even if the lens is replaced (cataract surgery), the vision may not be improved after surgery because of the film problem (fundus problem).