银幕上出现的清晰画面,是放映机上的胶片透过光的作用形成的。而眼睛的感光功能是由视细胞来完成的。我们坐在中间看电影,当强烈的电光照射在雪白银幕上时,立刻产生一部电光的反射。而反射时的光路与正入射的光路成逆行。由于长时间的反光照射,我们的眼睛就感到发酸、胀痛,同时摄像的真实感也会受到一定的影响。长期受这种反光的刺激,能使人们视力减退, The clear picture that appears on the screen is formed by the effect of light on the film on the projector. The light-sensitive function of the eye is done by the visual cells. We sat in the middle of the movie, when the intense electric light shone on the silver screen, an electric light reflection was immediately generated. While the optical path of the reflection and the optical path of the incident are retrograde. Due to prolonged light reflections, our eyes feel sore, painful, and the photographic realism will be affected to some extent. Long-term stimulation by this reflective, people can make vision loss,