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General Science => General Science => Topic started by: Geezer on 11/04/2010 05:58:40

Title: Why do dog's eyes reflect green light?
Post by: Geezer on 11/04/2010 05:58:40

As you can see, Shona has a long face because she does not get red eye with flash photography; she gets green eye instead.


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Why's that then? Shona would really like to know.

Title: Why do dog's eyes reflect green light?
Post by: RD on 11/04/2010 09:28:17

She matches the throw better with red eyes ...

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But wouldn't have such good night vision ... http://en.wikipedia.org/wiki/Tapetum_lucidum

http://www.thenakedscientists.com/forum/index.php?topic=15699.0

Title: Why do dog's eyes reflect green light?
Post by: Geezer on 11/04/2010 18:50:08

Thanks RD! Shona told me to ask you to send a set of the red contacts.

Title: Why do dog's eyes reflect green light?
Post by: Karen W. on 12/04/2010 00:39:32

LOL..LOL That is very interesting, and I wish I had RD's computer skills.. It cracks me up how he can do that with photos..LOL..

By the way,nice Scottish Terrier Geezer! How old is Shona, she looks like she might be mid aged to an older dog....

Title: Why do dog's eyes reflect green light?
Post by: Geezer on 12/04/2010 00:52:02

Quote from: Karen W. on 12/04/2010 00:39:32

LOL..LOL That is very interesting, and I wish I had RD's computer skills.. It cracks me up how he can do that with photos..LOL..

By the way,nice Scottish Terrier Geezer! How old is Shona, she looks like she might be mid aged to an older dog....

Shona is just two years old.

Title: Why do dog's eyes reflect green light?
Post by: Jessica H on 12/04/2010 03:59:22

What a cutie!


We get "red-eye" from the reflection off of our blood vessels in the retina. Dogs have a special layer of cells at the back of the eye, though, that reflect light back to the retina in order to help them see in low light, so that's the reflection you're seeing. 

I think it must be the same effect when my cats' eyes glow green when you shine a bit of light at them in a dark room.


http://europuppyblog.com/item/2008/01/why-do-dog-s-eyes-glow-in-the-dark (http://europuppyblog.com/item/2008/01/why-do-dog-s-eyes-glow-in-the-dark)

Title: Why do dog's eyes reflect green light?
Post by: Geezer on 12/04/2010 06:11:59

Quote from: Jessica H on 12/04/2010 03:59:22

What a cutie!


We get "red-eye" from the reflection off of our blood vessels in the retina. Dogs have a special layer of cells at the back of the eye, though, that reflect light back to the retina in order to help them see in low light, so that's the reflection you're seeing. 

I think it must be the same effect when my cats' eyes glow green when you shine a bit of light at them in a dark room.


http://europuppyblog.com/item/2008/01/why-do-dog-s-eyes-glow-in-the-dark (http://europuppyblog.com/item/2008/01/why-do-dog-s-eyes-glow-in-the-dark)

Thanks Jessica!

Shona is a great companion. She is quite a character, and very affectionate. Mrs G says Scotties are great.