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en.wikipedia.org/wiki/Red-eye_effect

The red-eye effect in photography is the common appearance of red pupils in color photographs of the eyes of humans and several other animals. It occurs when using a photographic flash very close to the camera lens (as ...

www.allaboutvision.com/resources/red-eye-photo.htm

The appearance of red eyes in pictures, known as the "red-eye effect," occurs when a camera captures light reflecting from the retina at the back of your subject's ...

www.aao.org/eye-health/tips-prevention/diagnosing-children-from-photographs

Jul 28, 2014 ... A red reflex is produced when the flash of a camera lights up the blood-rich retina . If the eyes are looking directly at the camera lens and the ...

petapixel.com/2016/08/30/science-behind-red-eye-effect

Aug 30, 2016 ... Photography and Camera News, Reviews, and Inspiration.

www.photographymad.com/pages/view/the-red-eye-effect-what-it-is-avoiding-it-and-removing-it

Red eye occurs when you use your camera's flash in a poorly-lit environment, like in a dark room, nightclub, or outdoors at night. In the dark, people's pupils ...

www.ask.com/youtube?q=Camera+Red+Eye&v=KBk0LBMjmbI
Dec 30, 2014 ... How can a camera's flash make your eyes glow red? Tune in to learn how it works -- and how to prevent it. Learn more at HowStuffWorks.com: ...

www.todayifoundout.com/index.php/2011/09/what-causes-red-eyes-in-photographs

Sep 15, 2011 ... Today I found out what makes your eyes red in flash photographs. ... For instance , camera's with red eye reduction settings use a two flash ...

www.yalescientific.org/2011/05/what-causes-the-red-eye-effect

May 12, 2011 ... The red-eye effect appears when flash photography is used at night ... of the eye's biology interacting with the camera's lighting mechanism.

www.scienceabc.com/humans/what-causes-red-eye-in-photographs-how-can-you-remove-it.html

Have you ever had a group photograph ruined, because you had a red eye in ... When the light from the camera flash goes off in a dark room (or any room with ...