Whether or not a projector hurts your eyes has to do with how long you look at the projection, your posture, and how you use it. Watching projection for a short period of time is less harmful to the eyes. If the projection screen is relatively small and in a dim environment, long-term or uninterrupted viewing of the projection can increase the load on the eyes, resulting in, visual fatigue vision loss and other problems. If you look directly at the light from the projector for a long time, it may irritate the retina and cause serious damage to the eyes, such as macular edema. The occurrence of visual fatigue can have symptoms such as soreness and tearing of the eyes. If you use a projector with a small projected image, in a dimly lit room, prolonged viewing may cause vision loss, especially if you have problems with myopia and astigmatism yourself. If you use the projector in an incorrect way, the light projected by the projector directly shines on your eyes, which may irritate the retina and gradually cause vision loss and distortion of vision. Therefore, when using a projector, pay attention to the combination of work and rest, and avoid looking at the projector for a long time or uninterruptedly. In addition, try to choose a projector with moderate brightness and a large clear picture, and pay attention to the laser projector’s light can not shoot directly into the eyes. If symptoms of discomfort occur, you should promptly seek medical attention.