Children with dilated pupils can see light after about eight hours if the dilation is rapid, or about two to three weeks if the dilation is chronic. Dilating a child’s pupils is usually used when an optometry is needed to measure the exact size of the eye. If the pupils are dilated quickly, the effect of the medication usually wears off in about eight hours, at which time our pupils will slowly become smaller and the patient’s photophobia can be relieved. Before pupil reduction, when seeing bright light, patients can wear sunglasses to relieve discomfort. In the case of chronic dilation, it usually takes half a month to three weeks for the patient’s pupils to gradually return to normal, and the symptoms of photophobia can be gradually relieved. It is recommended that patients who experience discomfort after dilation consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.