The prescription is determined to fit the patient’s lifestyle Each patient’s prescription may be different, which involves the calculation of the prescription. Parameters such as the patient’s corneal curvature and eye axis length are entered into a professional formula to calculate the prescription for each individual. After years of development, the accuracy of the calculation of the lens prescription has reached over 90%. At the same time, the selection of the lens prescription also takes into account the patient’s lifestyle. For example, those who use more distance vision in their lives should set aside more positive prescriptions; those who use more near vision in their lives should set aside more negative prescriptions. Therefore, the selection of the lens prescription requires both accurate calculation and the ability to fit the patient’s lifestyle. Therefore, patients should understand whether their lifestyle is to see more near or far before surgery, and express this clearly to the doctor. This will help the surgeon to select a more suitable IOL size for you before surgery.