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Why do human eyes appear bright red in photographs shot with a camera flash?
When we look at family photos taken indoors with an old camera flash, everyone looks like they have glowing red eyes. What optical reflection causes this effect?
T
TechGeek
asked 1mo ago · 10 rep
1 Answer(s)
0
The burst of camera flash light is so fast that human pupils don't have time to constrict. The bright light rays pass straight into the eye, reflecting off the blood-rich retina layer.
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ProPhoto
answered 1mo ago