Cataracts are a condition in which the lens is clouded causing reduced vision. It can be done as long as the vision is affecting your life. In the past, when it was said that cataracts could only be done if they were mature, it was in reference to the surgical treatment at the time, cataract intracapsular extraction. Nowadays, the choice of ultrasonic emulsion extraction depends on the degree of lens clouding and the hardness of the lens, but no matter which one is adopted, cataract maturity is not required. Generally speaking, the earlier it is done, the less difficult the surgery will be, because as the lens becomes more cloudy, the lens will become harder and the cloudy crystal will not be easily removed from the eye, and the more trauma the surgery will cause.