What Causes Red Eye in Photos?

I found an interesting article on what causes red eye. Obviously, I knew it had something to do with the flash, but did not know exactly what happens that causes red eye.

Here's what I found: Red eye is actually caused when the light from a flash is bounced off the back of the eye at an angle returning it toward the camera lens. When the flash is located close to the lens, the reflected light goes directly into the lens, resulting in red eye. Interesting! As a result, it is difficult to avoid red eye with many point-and-shoot cameras where the flash is located very close to the lens. Even cameras with a flutter flash, designed to eliminate red eye do not always work.

With today's digital photography, you can just load your pictures into the computer and correct red eye with digital tools quite easily.

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