Why do you get red eye???!
Question:
Why do you get red eye???
you know when you take a picture, your eyes appear to be red, why is that?
Answers:
The red color comes from light that reflects off of the retinas in our eyes.
The flash on a camera is bright enough to cause a reflection off of the retina -- what you see is the red color from the blood vessels nourishing the eye.
Many cameras have a "red eye reduction" feature. In these cameras, the flash goes off twice -- once right before the picture is taken, and then again to actually take the picture. The first flash causes people's pupils to contract, reducing "red eye" significantly. Another trick is to turn on all the lights in the room, which also contracts the pupil.
Another way to reduce or eliminate "red eye" in pictures is to move the flash away from the lens. On most small cameras, the flash is only an inch or two away from the lens, so the reflection comes right back into the lens and shows up on the film. If you can detach the flash and hold it several feet away from the lens, that helps a lot. You can also try bouncing the flash off the ceiling if that is an option.
Gotta love how stuff works website :)