Why Do Cat Eyes Glow in the Dark?

The video explains why some animals' eyes glow at night due to a structure called the tapetum lucidum, which reflects light back through the retina, enhancing night vision. It describes the basic eye structure, including the retina and optic nerve, and how the tapetum lucidum functions like a mirror. The video also covers how different animals have varying eye shine colors based on the materials in their tapetum lucidum, such as guanine, collagen, and riboflavin.

What is the primary function of the shiny structure found in the eyes of many animals?

• To protect the eyes from dust

• To help animals see underwater

• To improve night vision

• To enhance color vision during the day

What is the tapetum lucidum and what role does it play in an animal's vision?

• A pigment that absorbs excess light

• A part of the brain that processes visual signals

• A layer of tissue that reflects light back to the retina

• A type of lens that focuses light

How does the tapetum lucidum enhance an animal's ability to see in low light conditions?

• By changing the color of the eye

• By increasing the size of the pupil

• By reflecting light back to the retina

• By absorbing more light

Which material is used by fish in their tapetum lucidum to create a white eye shine?

• Zinc

• Guanine

• Collagen

• Riboflavin

What determines the color of a cat's eye shine?

• The speed of the optic nerve signals

• The thickness of the retina

• The size of the pupil

• The amount of riboflavin and zinc