The use of a projector itself does not normally damage a child’s eyes, but if the child is chronically fatigued, it can lead to vision loss or myopia progression. Because the light from the projector is diffusely reflected, there is no obvious effect on children’s vision, but if the child looks at the projector for a long time, close to the projector, it will cause excessive eye fatigue, which can lead to eye dryness, soreness, vision loss and other discomforts, and can also lead to myopia progression. Children should pay attention to the distance from the projector as far as possible when watching the projector, and maintain a good posture, parents should always supervise and control the time of children using the projector, to avoid causing excessive eye fatigue, which will have an impact on the eyesight of children. It is recommended that children with vision loss consult a doctor to assess their condition and follow the doctor’s instructions for treatment.