Cats' eyes glow because they have a film called "eye reflection", which reflects light, allowing the cat to see what is around them in the dark.
The cat's eyes do not glow, which is an inaccurate statement. It is essentially a phenomenon caused by the cat's eyes reflecting light sources. To see the surrounding environment clearly at night, cats need to actively enlarge their pupils.
The cat has a mirror-like structure in front of the retina, namely the bright blanket. When the faint light is ingested into the retina and hits the bright blanket, it will be reflected on the retina, causing the light-receiving cells to receive light stimulation again, enhancing the effect of light and thus increasing the cat's night vision.
Owners usually need to pay attention to supplementing taurine to protect their eyesight. Cats lacking taurine are prone to poor vision, destruction of retinal, cataracts and other problems.