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Here’s
the inside of the back of the eye again. Behind the retina is a
layer of shiny, blue-green stuff called the
tapetum
.
This layer assists night vision by reflecting light back through
the
retina
.
You don’t have a tapetum, but cats and cows (and other animals)
do. A cat’s eyes shine in the headlights of a car because
of the tapetum.
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