Question-Answer allows someone to ask what an object is, receive an answer from Twitter users and then hear that answer spoken. Memento allows a sighted user to teach Glass to recognise objects, and will then tell a visually-impaired user what they are looking at …
In one of the examples shown, Glass tells the visually-impaired user they are looking at two printers, it tells him their names and then as he gets closer warns that the laser-cutter requires care.
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