When you get cataract, choose the most suitable time to do cataract surgery, which can not only restore the best vision, but also reduce the pain of surgery, and save money, and most importantly, can avoid the harm of cataract. 1. You can’t wait until you can’t see to have surgery! It takes a long time, ranging from a few years to a dozen years, for the initial cataract to develop into a mature stage where you can’t see at all. The cataract maturation process is a process full of dangers, because during this period the cataract absorbs water and expands, resulting in narrowing of the anterior chamber angle. When the patient is stimulated or emotionally unstable, when the living climate changes seasons, acute angle-closure glaucoma is easily induced, and acute angle-closure glaucoma causes corneal edema, iris atrophy, pupil dilatation and optic nerve atrophy, which causes serious vision damage to cataract patients. and very painful. From this point of view, cataract patients should have their cataracts done as early as possible, the safer it is. 2. Cataracts lead to vision loss, and the vision of objects is not clear, and sometimes it is not even possible to distinguish between flat land and ditch, which can easily lead to falls and injuries. In elderly cataract patients, falls often lead to femoral head fractures, and surgical treatment of femoral head fractures is sometimes a very major operation that requires a large sum of money. From this point of view, cataract patients should do it as early as possible, the safer it is. 3. In terms of the indications for modern cataract ultrasound emulsification surgery, the better the vision of the patient, the softer the cataract nucleus, the safer and easier the surgery is, and the less surgical materials are needed, so the cost of the surgery will be less. Moreover, the vision after surgery can generally reach 0.8-1.5. 4.Patients with diabetes, high myopia, retinopathy and eye trauma should undergo cataract surgery as early as possible in order to find out whether there is any new risk to the retina in time, and if new retinal risks are found, timely prevention or treatment can be carried out. 5.The other eye has no chance of regaining its sight, this kind of cataract patients must have cataract surgery as early as possible! To ensure the success of the surgery, otherwise the surgery will unfortunately fail and mean blindness in both eyes. Therefore, patients who are in a position to opt for cataract ultrasound emulsification surgery should undergo cataract surgery if their vision is below 0.4.