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

It only takes your body around thirteen minutes to produce enough heat

Human Body Facts

One of the most common cosmetic injuries is poking the eyeball with a

Human Body Facts

80 percent of all learning comes through the eyes

Human Body Facts

Despite what you might think, your poo is made up of about 75% water

Human Body Facts

There are six billion steps of DNA in a single cell. If you stretched

Human Body Facts

The cornea is the only tissue in the human body that doesn’t contain