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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 .... Taking pictures without flash by increasing the ambient lighting, opening the lens ... In addition, people do not look natural with small pupils, and direct lighting from .... By using this site, you agree to the Terms of Use and Privacy Policy.

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

Tell your subjects to look slightly away from the lens ... the less likely you will have red eyes in pictures. Make the room brighter. ... Making the room less dim by turning on more lights can help eliminate red eyes. ... before the camera actually takes the picture.

www.quora.com/Why-do-some-people-have-red-eyes-in-pictures-and-some-do-not

Let me try to simplify the Wikipedia explanation, Red-eye effect - Wikipedia. The red spot in the ... And you see it in low light situations because pupils enlarge in low light and block less of the light ... Why do dogs eyes reflect green and not red when taking a picture? ... Why will our eyes turn red when we wake up from sleep ?

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. ... as if they are about to use you as a pre-lunch snack, has to do with how ... can be seen in pictures of animals with heterochromatic eyes (two different colored eyes). ... Should you simply turn on more lights, your pupils will also constrict.

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

Jul 28, 2014 ... We are taking more pictures than ever, and sharing them with a growing ... If you do spot an abnormal red reflex, bring the photo to your child's ...

electronics.howstuffworks.com/question51.htm

Take a look at the science behind why red eyes happen. ... We've all see photographs where the people in the picture have spooky red eyes. ... If you shine a flashlight or headlights into their eyes at night, their eyes shine back with bright, ... The first flash causes people's pupils to contract, reducing "red eye" significantly.

www.thenakedscientists.com/articles/questions/what-causes-red-eye-photographs

Dec 6, 2009 ... Red eye occurs because when you take a flash photograph - the camera ... I myself NEVER have red eyes on photos, but my wife often does. ... People with wider pupils are more likely to end up with red eye in photos, ...

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 because the eye is unprepared for the sudden influx of light. Photo ...

coopervision.com/blog/why-eyes-turn-red-pictures

Nov 4, 2014 ... Why Eyes Turn Red in Pictures ... Why does red-eye happen? ... If you take a photo of your cat or dog, you may notice the color may be green or ...