See whether the projector than watching TV to harm the eyes, and the two imaging principle, the viewing environment, from the imaging principle of the projector on the eyes of the damage than the TV is small, from the viewing environment of the projector on the eyes of the damage than the TV. 1. imaging principle: the projector is through the diffuse reflection behind the curtain, the picture will be presented to the eyes. While the TV is through the light-emitting plate to illuminate the liquid crystal display image, or through the pixel light-emitting composition of the picture. In contrast, the projector does not directly irradiate the eyes of the viewer, which is less harmful to the eyes. 2. 2. Viewing environment: Since most projectors need to be used in a darker environment, the environmental contrast is higher. TV can be viewed in normal light. In contrast, the use of projectors will be more harmful to the eyes than TV. Whether it is a projector or TV, long time viewing will cause some damage to the eyes, should pay attention to the length of viewing, to develop healthy eye habits. It is recommended that patients who experience eye discomfort from watching projectors or television should seek medical attention in a timely manner to assess their condition and follow the doctor’s instructions for regular treatment.