Optical head-mounted display

An optical head-mounted display (OHMD) is a wearable device that has the capability of reflecting projected images as well as allowing the user to see through it.

OHMD technology has existed since 1997 in various forms, but despite a number of attempts from industry, has yet to have had major commercial success.

[10] According to a survey of more than 4,600 U.S. adults conducted by Forrester Research, around 12 percent of respondents are willing to wear Google Glass or other similar device if it offers a service that piques their interest.

[11] Business Insider's BI Intelligence expects an annual sales of 21 million Google Glass units by 2018.

[12] According to reliable reports, Samsung and Microsoft are expected to develop their own version of Google Glass within six months with a price range of $200 to $500.