Why Are My Eyes Red in Pictures? The Scientific Flash Explanation
The Pupil Problem: The "red-eye" effect only happens because the camera's flash is faster than your eyes. Your pupils are wide open in the dark, and they can't shrink fast enough to block the sudden, bright flash.
Color Difference: People with lighter eye colors or naturally larger pupils are often more susceptible to having red eyes in photos.
Simple Fixes: To avoid the effect, just ask the subject to look slightly away from the camera lens or simply turn on more lights in the room.
The Danger Sign: While the classic red-eye is normal, if a photo consistently shows one eye with an unusual white or yellow reflection instead of red, it could be a rare sign of a serious eye condition and should be medically checked.
Camera Trick: Many modern cameras use a "pre-flash" (a tiny flash right before the main one) to trick the pupils into constricting and reducing the red-eye effect.
