Multifocal lens implantation is a kind of myopia corrective surgery, most people will not have after-effects, and a small number of people may be left with after-effects such as allergies and infections after the surgery. Generally speaking, the technology of multifocal lens implantation is more mature nowadays, and most people will not have obvious after-effects. However, the surgery will cause stimulation to local tissues, and a small number of people may not recover in time if they recover slowly or if they develop infections after the surgery. Very few patients may also have an allergic reaction to the lens material. It is recommended that patients who have myopia and want to undergo surgery should choose regular medical institutions for treatment, and should pay attention to adequate care after surgery to maintain cleanliness and prevent infection from occurring. If there are abnormal symptoms, seek medical help in time.