Red Eye is a condition caused by the camera flash reflecting off the back of a person's eye.  It shows up as a bright red glare in a subject's eyes.  The flash is reflected off the retina and is picked up by the camera. What you are actually seeing is the reflection of blood in the eye. 
Red Eye can and will be removed on your final print free of charge.

Some of the images you see on this site have been quickly adjusted for red eye to make them look better for your viewing. Due to this quick adjusting, some eyes on this site might look a little blurry but be assured that on your final print all red eye will be professionally removed and will NOT look blurry.