"Unlike human eyes, which work best in day light, the cat’s eyes must function well in extremely low light condition and as such are well suited to an animal that is predominantly nocturnal and crepuscular in activity. In darkness, cats eyes are able to function in approximately one-sixth of the light needed for human vision. However they must also be able to function well in daylight – so just how is this achieved.
In low light levels the cats pupil must be able to open as wide as possible, but also be able to contract to very small size to protect the sensitive retina in bright sunlight. In human eyes, this size variation of the pupil is controlled by a circular ciliary muscle, but this limits the amount of size variation. In cats however, the same process is controlled by two, shutter-like ciliary muscles, which gives the cat it’s characteristic slit-like pupil in bright light conditions. "
visualdensity, and 50 other people added this photo to their favorites.
simpsonyiu.com 70 months ago | reply
floating head.. so sharp!
visualdensity 70 months ago | reply
Awesome use of dof and beautifully crisp sharp!
moocatmoocat 70 months ago | reply
love the clarity and blur, great eyes and interesting info
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Seen in The World Through My Eyes - Post 1 / Comment Any 1 (?)
crazyc78 70 months ago | reply
People's Choice
bonamynorman 70 months ago | reply
ace shot, only possible with this type of lense... I just wish nikon had a true 50mm for digital that opened to 1.2.... :>(
wizards.stone 70 months ago | reply
People's Choice
i_plus 70 months ago | reply
I love this one!
You are invited to add your Wonderful Picture to:
Enjoy Life
Thank you for sharing it with us!
rouppasongbarbara 65 months ago | reply
CUTE!
iluvcocacola 63 months ago | reply
Very nice dof. This image would compliment the depth of field group
www.flickr.com/groups/dof/
victoria0805 61 months ago | reply
This is Fur with attitude! Please join us.
Creswald 58 months ago | reply
Your picture is awesome.
Please join us at Cats - The Best Shots, we'd love to have this added to the group!
Luke James Murray 53 months ago | reply
lovely photo and nice colours !!!!
CNBC.com 52 months ago | reply
We would love to use this picture in one of our slideshow. Thanks!
BuffleHead Photography 47 months ago | reply
Hi, I'm an admin for a group called The Cat's Eye's, and we'd love to have this added to the group!
ChrisReilly 44 months ago | reply
Thank you for the great photo, I have posted it at cat-care.suite101.com/article.cfm/harmful_kitty_litter_al...
hayes20 35 months ago | reply
Love your picture. I am using it for an article on hyperthyroid cats on petsuggestions.com
Thanks for making it available!