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running dog
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Running Dog

Senses
• Sight
Like most mammals, dogs are dichromats and have color vision equivalent to red-green color blindness in humans (deuteranopia).
The dog's visual system has evolved to aid proficient hunting. While a dog's visual acuity is poor (that of a poodle's has been estimated to translate to a Snellen rating of 20/75), their visual discrimination for moving objects is very high; dogs have been shown to be able to discriminate between humans (e.g. identifying their owner) from distances up to a mile. As crepuscular hunters, dogs often rely on their vision in low light situations: they have very large pupils, a high density of rods in the fovea, an increased flicker rate, and a tapetum lucidum. The tapetum is a reflective surface behind the retina that reflects light back to give the photoreceptors a second chance to catch the photons.

File information
Filename:368008.jpg
Album name:Fauna & Flora
Rating (1 votes):55555
Keywords:#running #dog
Filesize:57 KiB
Date added:Mar 25, 2011
Dimensions:462 x 600 pixels
Displayed:54 times
URL:displayimage.php?pid=368008
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