1. A system, comprising: an interactive head-mounted eyepiece worn by a user, wherein the eyepiece includes an optical assembly through which the user views a surrounding environment combined with displayed content, an integrated processor for handling content for display to the user, and an integrated image source for introducing the content to the optical assembly, wherein the optical assembly comprises a photochromic layer and a heater layer disposed on a see-through lens of the optical assembly, wherein the photochromic layer is heated by the heater layer to accelerate its transition from dark to clear.