The most common reason why children’s vision is not as good as before after dilating their pupils is the effect of the dilating medication. This is because when dilating the pupils, the doctor will choose to use dilating drugs. The main purpose of the medication is to anesthetize the ciliary muscle, which affects the ability of the ciliary muscle to regulate, and when the child looks at the object close up, there may be a blurring of the situation, so that the vision is not as good as before. Generally, after the drug is metabolized, it will return to normal, but each person’s state is different, the recovery time will be different, and some children may recover for a longer period of time. After dilating the pupils, pay attention to eye care, avoid bright light stimulation, when going out you can choose umbrellas or wear sunglasses. After dilating the pupils, if your eyes become itchy, dry and other abnormalities, seek medical attention promptly.