What is the cause of the "red-eye" phenomenon in flash photography?
Might that be the bright light illuminating the blood vessels on the retina?
Sean
Sean P. Lally - Science Chairman High School Physics Teachers Assn.
Sewickley Academy www.pitt.edu/~johnmcl/hspta
315 Academy Avenue
Sewickley, PA 15143
(412) 741-2230 x 3046
(412) 741-7632 fax