> My advise is to leave the gimmicky red eye reduction alone.  It works
> by attempting to reduce the size of your pupil before the real flash.

The red eye reduction flash is only a fraction of a second before the real
flash and exposure.  I don't think the iris responds that fast.

The explanation I heard is that it causes you to look at the flash instead
of into the lens.  This different angle reduces the light that bounces
directly back from your eye.  I'm a little skeptical that such a slight
different in eye angle would make a significant difference in the red eye
reflection, so this explanation is only slightly more plausible than the
one above.


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