Christopher Grayson

Abstract The risk of periprosthetic joint infection (PJI) subsequently developing at a second site after an initial PJI has been documented to be approximately 18%-20%. To the best of our knowledge, only a single study has evaluated the incidence in ipsilateral joints and if the risk of infection would be different.

By Chris Grayson In 2012, Google unveiled Google Glass and within a year made the proprietary smartglass available to consumers under their Glass Explorer program. With much fanfare, a partnership was launched with Diane von Furstenberg, and the device even starred in a multipage pictorial for Vogue. Despite some initial excitement among some consumers and eyecare practitioners, Google Glass had issues from the start.

In this article we will make a comparison between waveguides and laser to holographic combiners. In doing so we will also look at North (formerly Thalmic Labs), their business success, and their IP, and place that into the context of the greater smartglasses market, and near-eye optics IP.