Bacterial infections in children are mainly caused by bacterial infections, which can be caused by foreign bacteria, such as hand rubbing or other contact with the eye. It can also be caused by the presence of bacteria on the surface of the eye itself, which can proliferate due to the low resistance of the child’s body. However, mydriasis is ultimately a purulent inflammation caused by bacteria, so treatment is mainly based on the use of anti-inflammatory drugs, such as levofloxacin or tobramycin eye drops, which are relatively fine. If the child is about 1 year old, Topaz eye drops will be relatively safer. It is also possible to combine anti-inflammatory treatment with Topaz ophthalmic ointment, which is more effective in combination. If the child is older and the degree of mydriasis is more serious, oral cephalosporins can be taken to promote faster improvement of mydriasis.