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How Red Eyes in Photographs Work

July 14, 2008 14:32

00:00 / 03:11

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The flash of a camera is bright enough to cause a reflection off the human retina -- the red we see in these photos comes from the blood vessels in the eye. Learn more about red eyes and cameras in this HowStuffWorks podcast. Learn more about advertising on the HowStuffWorks podcasts at [www.howstuffworks.com/advertisers.htm](http://www.howstuffworks.com/advertisers.htm) And to learn about your ad choices when listening to podcasts, visit Read more
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v2016-04-22T10:14:54+00:00how-stuff-works
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