1. A system, comprising: an interactive head-mounted eyepiece worn by a user, wherein the eyepiece includes a modular 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 modular optical assembly, wherein the optical assembly comprises a reflective image display that generates and reflects image light to an optically flat film disposed at an angle in front of a user's eye that reflects said image light from the image source to a curved partially reflecting mirror of the optical assembly, wherein the curved partially reflecting mirror reflects a portion of the image light from the image source and transmits a portion of the scene light from a see-through view of the surrounding environment, so that a combined image comprised of portions of the reflected image light and the transmitted scene light is transmitted through the optically flat film and provided to the user's eye, wherein the optical assembly comprises a modular image source, wherein the modular image source is mounted in a frame of the eyepiece such that its position with respect to a user's eye can be adjusted.