posted on Apr, 7 2011 @ 04:03 AM
I have wondered about this quite often as I am Caucasian with light green eyes, but I have never had "red eyes" on photos.
The reason for this is:
-the reflective layers behind the nerve receptors in my retinas are dull. This explains why I don't have good night vision at all. So while this
isn't ideal for night time adventures in the wild, it is great for stage lighting and party pics.
People with darker eyes also have more layers of melanin for the light to travel through before it reflects as "vampire eyes."