Google Glass was developed by Google X. The facility within Google devoted to
technological advancements such as driverless cars.
Google Glass is smaller and slimmer than previous head-mounted display designs.
The Google Glass prototype resembled standard eyeglasses with the lens replaced
by a head-up display.
In mid-2011, Google engineered a prototype that weighed 8 pounds (3,600 g); by 2013 they were lighter than the average pair of sunglasses.
In April 2013, the Explorer Edition was made available to Google I/O developers in the United States for $1,500.
The product was publicly announced in April 2012. Sergey Brin wore a prototype of the Glass to an April 5, 2012, Foundation Fighting Blindness event in San Francisco. In May 2012, Google demonstrated for the first time how Google Glass could be used to shoot video.
Google provided four prescription frame choices for $225 and free with the purchase of any new Glass unit. Google entered in a partnership with the Italian eyewear company Luxottica, owners of the Ray-Ban, Oakley, and other brands, to offer additional frame designs. In June 2014, Nepal Government adopted Google Glass for tackling poachers of wild animals and herbs of Chitwan International Park and other parks listed under World heritage sites. Gurkha Military currently uses Google Glass to track the animals and birds in the jungle. This operation led to the latest development in military operation. Google Glass was used in military for the first time in the world by Nepal.