It is recommended to look into the distance for 2-3 minutes in about 30-40 minutes, which can play a role in relaxing the eye muscles and relieving eye fatigue. If the child is relatively small, you can shorten the time, usually about 20-30 minutes you can let the child look at the distance, strive to be 10-20 meters away from the target, but the target is not too bright, can play a relaxing role. This will not lead to pseudo-myopia or pseudo-vision loss, and it is usually possible to relieve visual fatigue by looking into the distance after using the eyes at close range.