Question

Why does cat’s eyes shines in darkness?

Answer 1

Cats have a layer of tissue in their eyes called the tapetum lucidum which reflects light, allowing them to see in low light conditions. This is why cats' eyes appear to "glow" in the dark.

Answer 2

We now know that cat's eyes appear to glow because they, along with the eyes of many other nocturnal animals, reflect light. All eyes reflect light, but some eyes have a special reflective structure called a tapetum lucidum that create the appearance of glowing at night.