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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

Learn why your eyes look red in pictures but your pets' eyes glow, and read tips ... Does Turning Off The Flash Reduce Red Eyes? Yes, if there is enough light in the room to take a picture without using the flash, you'll avoid red eyes in photos.

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 ... Why will our eyes turn red when we wake up from sleep? ... if you know how to take proper pics, if your camera has proper picture quality ...

lifehacker.com/why-your-eyes-look-red-in-photos-and-how-to-prevent-it-1785821974

Aug 29, 2016 ... When your eyes glow red in photos, it's often because you're taking the ... the room before a photo, too, to make sure your pupils aren't wide to ...

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, ...

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 ...

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

Jul 28, 2014 ... Did you know that a photograph could provide valuable and potentially ... eyes? We are taking more pictures th. ... If you do spot an abnormal red reflex, bring the photo to your child's pediatrician or a pediatric ophthalmologist.

photo.stackexchange.com/questions/47553/can-red-eye-in-only-one-eye-be-a-sign-of-cancer

Feb 3, 2014 ... If you take a lot of flash photos, with the flash pointed directly at the subjects, you' ll ... which might correlate with a disease has very little to do with proper diagnosis. ... E.g. have someone photograph you from 5 meters when you have a pencil between your right eye and the camera, you look over the top of ...

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.