Stand in front of a life size mirror and look directly at the tip of your nose. The positioning of your pupils inside your eye sockets is your Natural Optical Center. The Natural Optical Center is the point that gives your brain a perfectly clear and most complete picture of the object you are looking at. So this is the easy part.

It gets tricky when you have to align your Natural Optical Center with the Optical Center of your prescription lenses you are about to order.