What Makes Cats’ Eyes Reflect In The Dark?

The eyes of a cat have a layer of reflective cells immediately behind the retina, known as the tapetum. Any light not absorbed by the microscopic rod-like structures in the back of the eye, especially when a cat’s pupils are fully open, is passed back out. This process creates the distinctive, characteristic shine in the cat’s eyes and is common to many land carnivores as well as seals.

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