Foxconn has reportedly begun to test out the fabrication of lenses for Apple's rumored first-gen smart glasses. Apparently, these components are to be semi-transparent, and to be capable of displaying projected images to the user. They would be superimposed on "real-world" objects in this wearer's field of view.
https://www.notebookcheck.net/The-lenses-for-Apple-s-AR-glasses-are-slated-to-be-made-by-Foxconn.481138.0.html