Red-eye in photos is caused by light from the flash bouncing off the capillaries in your eyes.

Red-eye in photos is caused by light from the flash bouncing off the

More from the Human Body Facts niche...

Human Body Facts

Biologists believe that breathing through the mouth causes the bladder

Human Body Facts

The muscles which help your eyes to focus complete around 100,000

Human Body Facts

Some people have a fear of eyes; it’s called ommatophobia

Human Body Facts

You see things upside down – it is your brain which turns the image the

Human Body Facts

Your nose can remember around 50,000 individual smells

Human Body Facts

Although it only accounts for around 2% of the body’s mass, the human