Google Glass was the search giant's first attempt at smart glasses, and could clip onto transparent spectacles to deliver info and shots from its camera via an eyeball-level LED. It was not a popular release, not least because of its ultra-high price tag. Nevertheless, Google is developing second-gen Glass, which is to target corporations rather than consumers.
https://www.notebookcheck.net/Google-Glass-is-coming-back-but-will-stay-in-a-business-oriented-sandbox-this-time.361716.0.html