Smart glasses offer users a keyboard to type text
K-Glass, smart glasses reinforced with augmented reality that were first developed by the Korea Advanced Institute of Science and Technology (KAIST) in 2014, with the second version released in 2015, is back with an even stronger model. The latest version, called K-Glass 3, allows users to text a message or type in key words for Internet surfing by offering a virtual keyboard for text and even one for a piano. Ref. Source 4w.