As part of the December software update, Google Glass wearers can now take photos by winking.
The device’s built-in screen and camera registers the movement of the eye to take the shot.
To make sure it’s not mistaken for a blink, the wink will need to be exaggerated to register.
Google announced the feature could one day be used to pay for goods or to wink at pages in a recipe book, to make the instructions appear on the screen.
Other updates include uploading YouTube videos straight from the gadget.
Users can now see Hangout conversations on the screen and +Google Music Play subscribers will be able to control playlists through Google Glass.
There is also a lock screen to prevent people from accessing the device without permission.
Google announced that the iOS app is ready but won’t be available until a later software update.