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Name: Delbert
Status: educator
Age: 50s
Location: N/A
Country: N/A
Date: 1/13/2003
Question:
The eyes of animals that possess a tapetum lucidum glow in the dark when exposed to a light source due to retroreflectivity. The color varies with species. Do you know which animals in the western United States exhibit red eye color due to retroreflectivity?

Replies:
You will have to check the literature, but I think an answer is HUMANS. I believe this is the cause of the "red eye" effect when you photograph a person "head on". The eyes look like two red dots.

Vince Calder

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