HP Photosmart E317 - Manual (Page 33)

33 Taking Pictures and Recording Video Clips
Red Eye
The red-eye phenomenon is caused by light from the flash
reflecting off the subjects’ eyes, which sometimes makes a
human’s eyes appear red or an animal’s eyes appear green
or white in the captured image. When you use a flash setting
with red-eye reduction, the camera flashes quickly up to three
times to minimize the subject’s pupils, thus reducing the effect
of the red-eye phenomenon, before the camera uses the main
flash. It will take longer to take a picture using red-eye
reduction, because the shutter is delayed for the additional
flashes. Therefore, make sure your subjects wait for the
additional flashes.