The characteristic of human eyesight is its extraordinary skill. He cannot see in the dark , nor can he see in the bright light. Cameras that work well in daylight are almost useless in the dark. Again, all the cameras that work well in low light do not work well in strong light. The human eye works regardless of light or darkness. However, when you suddenly go from light to light, nothing is seen at first. I think my eyes became completely blind. After a few minutes all is gradually visible. The eye perceives light with the help of rod and any type of cell or molecule. A cell can detect the existence of color in intense light and a rod cell can see the black-and-white scene in low light. In addition, the rod cell contains a chemical called rodopsin, which absorbs photons and perceives the existence of light. When the rhodopsin molecule terminates the photon molecule, it splits into retinal and opsin molecules. These two split molecules then combine again at a very slow speed to form rhodopsin molecules. So when we look at it in intense light, all of the Rhodopsin splits into retinal and opsin. In this case, if we enter a dark room, at first nothing can be seen with the naked eye , because if there is not enough light, no one can see and the rod is also ineffective because there is no rodpsin in the rod. Gradually, however, the molecules divided into retinal and opioids combine to form rhodopsin, which can be seen in the dark again. That is why it takes some time for the eyes to become accustomed to darkness and light. Source of information: Mystery in the realm of science