At night when the light is pointed towards dogs and cats, their eyes give a gleaming effect (greenish light). It even happens during a flash of a camera. I've seen this on a cat and the dog and afterward both stared for a while.
I don't flash lights into my animal's eye on purpose, but while finding my way in darkness I need to watch my step. Even when the light falls on their eye they do not turn away or move their head other way they simply stare on. Is it disturbing for them to have the light shine on their eyes? Does this have any effect on their vision, or is it just a temporary effect which fades (as in humans' vision when exposed to a flash)?