I currently work for a company that sells primarily Varilux PALs. Nothing fancy just the Ellipse, Comfort & Physio and none of the digital variants of those lenses although we do offer non-Essilor Digital lenses. Could anybody give me some advice as to how to describe the differences of theses products to new employees with not much experience? I hear people selling Physios all the time to the exclusion of other lenses including digital lenses, and the language used is not what I would consider knowledgeable.