Why Do Eyes Of Cats Shine At Night?


Why do dogs and cats eyes glow?

Have you ever noticed how dogs and cats eyes glow? Well i would like to know why?

Cats' eyes shine in the dark due to the presence of a light-reflecting surface called the tapetum lucidum. The tapetum lucidum, located behind the retina, is composed of fifteen layers of special glittering cells of the substance guanine.

The tapetum lucidum reflects any light that is not absorbed as light passes through the retina of the eye. The reflection by the tapetum lucidum allows the retina to absorb extra light, which aids the cat's night vision. Another consequence of the tapetum lucidum is that it causes the cat's eyes to shine in dim light, when the light hits the eyes at certain angles.

A cat's shining eyes usually appear greenish or golden. The eyes of the Siamese cat reflect a luminous ruby red.

What animal hs red eyes that shine at nighttime?

We live in the SE USA in a somewhat rural area. We have heard of people seeing a black panther and a fox in the neighborhood, but who knows what is really out there. One night, my dad was coming home from work and it was very dark out. When he was heading toward the house, he noticed two glowing red eyes go down the deer trail behind my house. Could this be a deer or maybe something else?

It could be anything with a tapetum lucidum. Their eyes only shine because there's a mirror on the back of their retina that reflects light. If you shine red light on them, they will shine red. They're iridescent as well, so it further depends on what angle you look at them from.

This includes deer, foxes, coyotes, racoons, domestic dogs and cats. Pretty much any animal that is active at night at all.

There are no "black panthers" in the southern US. There are only black jaguars in south america, and black leopards in the old world.

Is it possible for a humans eyes to glow in the dark?

This sort of a random question but is it possible? U know how cats eyes glow in the dark? Is it possible to make someones eyes glow in the dark like cats do?

No huan eyes cannot glow in the dark naturally (excluding antything manufactured to make eyes glow)
animals have a better ability to see in the dark because they have a special layer in their eye called the tapetum lucidum. This layer acts like a mirror and collects light in low light situations and it is also what you are seeing when you shine a light into the eyes of an animal. It's like they have built in night vision goggles.
We humans do not have this layer.

Why do a chihuahua's eyes shine red when other dog's shine blue/green?

I have a chihuahua mix and her eyeshine is red. I have been looking at pictures of the breed and this is a breed trait. Why do the chihuahua's eyes shine red when almost every other dog I have see shines blue or bluish green

It just depends on the camera you use and the lighting. I have a Chihuahua mix (Chihuahua/Jrt) and her eyes usually shine blue/green. But sometimes (rarely) shine red.

It has nothing to do with the dog

(by the way my dog has dark brown eyes)

Here is a photo:

http://www.flickr.com/photos/abbyroadzacksasha/3945723526/

http://www.flickr.com/photos/abbyroadzacksasha/3916710690/

My poodles eyes usually never have a shine to them but if they do they are red. Again depends on the camera and the lighting.

What does age of aquarius mean?

what is waiting earth during the age of aquarius? a new evolution related to new gravity forces? or something other? or just there will be nothing and we would have a SUV and go safari with our friends?

It means nothing it is a medley of 2 songs from the Musical "hair" from 1969:

When the moon is in the Seventh House
And Jupiter aligns with Mars
Then peace will guide the planets
And love will steer the stars

This is the dawning of the Age of Aquarius
The Age of Aquarius
Aquarius! Aquarius!

Harmony and understanding
Sympathy and trust abounding
No more falsehoods or derisions
Golden living dreams of visions
Mystic crystal revelation
And the mind's true liberation
Aquarius! Aquarius!

When the moon is in the Seventh House
And Jupiter aligns with Mars
Then peace will guide the planets
And love will steer the stars

This is the dawning of the Age of Aquarius
The Age of Aquarius
Aquarius! Aquarius!

Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in
Let the sun shine, Let the sun shine in
The sun shine in



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