Due to the improvement of cataract surgery equipment and technology, cataract surgery is now not done until the cataract is mature and you can’t see anything. This is an old concept, in the past when extracapsular cataract extraction was the mainstream procedure, mature cataracts were a little more convenient to do, but now it is completely different, the mainstream procedure is now ultrasonic emulsion surgery, the older the cataract the greater the test for the operator, i.e. The more mature the cataract, the more difficult and risky the surgery is, and the greater the chance of complications. Although ultrasound emulsification is a minimally invasive procedure, because it emulsifies the nucleus through ultrasound energy, the older the nucleus, the greater the ultrasound energy required, and the more damage it may still cause to the eye. Therefore, when cataracts are found to affect vision and require surgery, one should not be afraid of surgery or delay a good time by waiting for maturation. Of course, everyone has different requirements for visual quality, and we can consider when to receive cataract surgery according to our own requirements for quality of life and other specific circumstances. Generally speaking, surgery can be considered when the vision is lower than 0.4 simply because of cataract, and there is no absolute standard for this, which varies from person to person. Patients think that their vision has decreased to the extent that it affects the quality of life, or the eye with poorer original vision has undergone cataract surgery At this time, even if the vision of the relatively good eye is higher than 0.4, surgery can be considered to obtain a better balanced visual quality. In terms of whether to do surgery and when to do it, patients themselves should have a great choice and say. Doctors should give patients the right information and help analyze the pros and cons, but in terms of whether they can do surgery or not, it should mainly be the doctor’s call! Because everyone has different eye conditions and different types and degrees of cataracts, doctors will decide whether cataract surgery can be performed and analyze the risks and pros and cons of surgery based on the specifics of the preoperative examination.