The camera records this reflected light. The main cause of the red color is the
ample amount of blood in the choroid which nourishes the back of the eye and is
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
Taking flash pictures of someone often gives their eyes a scary-looking red glow.
You'll find out why in this Science Update.
Jul 28, 2014 ... Photos Can Help Diagnose Children's Eye Problems & Save Sight ... A red reflex
is produced when the flash of a camera lights up the ...
If the angle of reflection is less than 2.5 degree, red eye will occur. ... When red-
eye reduction is in effect, do not move the camera immediately after the shutter ...
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 ...
The flash on a camera is bright enough, however, to cause a reflection off of the
retina -- what you see is the red color from the blood vessels nourishing the eye.
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.
Dec 6, 2009 ... I have a question about "redeye" when taking a picture using a camera. I've
recently started the task of correctly sorting through all by digital ...
Sep 20, 2002 ... Most Coolpix cameras offer an In-Camera Red-Eye Fix reduction process. This
powerful Nikon technology analyzes the image automatically ...