Tapetum lucidum - Wikipedia  Odd-eyed cat with eyeshine, plus red-eye effect in one eye

Tapetum lucidum - Wikipedia Odd-eyed cat with eyeshine, plus red-eye effect in one eye

an alligator has a tapetum lucidum at the back of each eye, which reflects light back into the photoreceptor cells to make the most of low light. the colour of eyeshine differs from species to species, but in alligators glows red. the length of the alligator can be approximated by judging the distance between the eyes, making this alligator very long.  photo by larry lynch

an alligator has a tapetum lucidum at the back of each eye, which reflects light back into the photoreceptor cells to make the most of low light. the colour of eyeshine differs from species to species, but in alligators glows red. the length of the alligator can be approximated by judging the distance between the eyes, making this alligator very long. photo by larry lynch

An alligator has a tapetum lucidum at the back of each eye, which reflects light back into the photoreceptor cells to make the most of low light. The color of eyeshine differs from species to species, but in alligators it glows red.

An alligator has a tapetum lucidum at the back of each eye, which reflects light back into the photoreceptor cells to make the most of low light. The color of eyeshine differs from species to species, but in alligators it glows red.

an alligator has a tapetum lucidum at the back of each eye, which reflects light back into the photoreceptor cells to make the most of low light. the colour of eyeshine differs from species to species, but in alligators glows red.

an alligator has a tapetum lucidum at the back of each eye, which reflects light back into the photoreceptor cells to make the most of low light. the colour of eyeshine differs from species to species, but in alligators glows red.

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