Badminton hit to the eyeball pupil enlargement is not serious. If the badminton hit to the eyeball pupil enlargement, may be traumatic pupil sphincter damage caused by the eye will appear pain, fear of light, see things blurred and other symptoms, generally not serious. For the problem of eyeball pupil enlargement, you can apply pupil shrinking drugs under the guidance of a professional doctor, such as cotrimoxazole taurine eye drops, nitric acid woolfruit rutabaga eye drops, etc., to promote the pupil retraction. If the pupil does not retract after a week, it is recommended to go to the hospital for a review and eye examination by a professional ophthalmologist to clarify whether there are other problems. It should be noted that eye drops should not be used for a long time to avoid eye damage. Usually should pay attention to rest, do not use the eyes for a long time, to avoid eye fatigue, go out and try to wear sunglasses or color-changing lenses to reduce light stimulation.