The reason why cat's eyes shine at night? The cat's eyes glow because the cat's eyes contain a cell called the retina inside, which reflects light, causing the eyes to glow in the dark.
The cat's eyes will shine in the dark because there is a light reflective layer called a "choroidal blanket" (or bright blanket, illumination membrane) behind the cat's eyes. It acts like a mirror behind the retina that can reflect light back to the cells of the retina.
With this eye structure, cats can make full use of every ray of light entering their eyes to see things on the dark streets or in the rooms.