More Project glass news has been uncovered today with yet another patent filing from Mountain View. The patent covers a method for locking and unlocking your device "...using eye tracking information...". Interestingly several methods are discussed in the patent which would make accidental unlocking with a condition such as nystagmus unlikely. Saccadic movements and pursuit movements are incorporated as options, presumably for user preference. Detection of how far a user has read in a text passage will be used to scroll through the text.
This development isn't surprising given the glasses design and single touchpad approach. Making an eye movement gesture and then taking a photo with a second gesture on the touchpad or by winking etc would mean a fluid interface.
Source: USPTO
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