Heard about this on the radio this morning. As an employee of Canon, I thought it particularly interesting.
You know that annoying “red eye” you get from flash photography, where the blood vessels in the retina cause a red glow in the eyes of the people you’re photographing? Well… sometimes it’s not red. It can be yellow or white… and that’s usually not a good thing!
Turns out it can be an early diagnostic of several eye problems. Some very serious. Early detection is key to good outcomes from treatment. So – go take some photos of the ones you love!
Here’s a web page for more information: Home – Know The GlowKnow The Glow | Know The GLow.
To give you an idea of what to look out for they also have a gallery of examples.