DRdreeves·Jun 12, 2013
"Although functional, the experience was subpar, because the head proximity sensor was very unreliable when next to a lens."
I turned off my proximity sensor (that's an option in settings -- "On-Head Detection") because the false positives (like turning on or off because my finger covered the sensor briefly) were more annoying than having to turn it on and off with the power button.
So unless there's more use for the proximity sensor I'd say this is a small price to pay if you want to attach google glass to your regular glasses.
One possible use for the proximity sensor, though, is wink detection: https://github.com/kaze0/winky
On the other hand, there's a dedicated button for taking a picture so winking as an input method I think would only be useful in situations where you don't want to use either your hands or your voice. And there may
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well be such situations.