While driving a vehicle at night and if a light beam is flashed in the eyes of the Dog, we find that the Eyes appear very prominent.. Why is it so? Why do human eyes dont appear likewise?
2007-03-08 22:19:48 · 2 answers · asked by rbala1952 2 in Pets ➔ Dogs
you know what that is a good one .
the eyes shine because of a special irridescent layer called the tapetum lucidum, behind the retina and around the optic nerve, that acts like a mirror. Light passing into the animal's eyeball bounces offf the tapetum lucidum, giving the animal the ability to reflect (within its own eye) what little light is incoming, thus allowing it see in near darkness.
The eyes shine at night because that's when the pupils are dilated wide enough for the tapetum lucidum to be visible.
And humans' eyes don't shine because they don't have a tapetum lucidum. We're not night-hunters, despire the evidence of lots of guys hanging around bars way after dark.=^ }
2007-03-08 23:00:24 · answer #1 · answered by Anonymous · 4⤊ 0⤋
Dogs have different "cones and rods" in their eyes than humans do. Google it-no joke.
2007-03-09 08:33:37 · answer #2 · answered by W. 7 · 1⤊ 2⤋