Google has introduced a new feature to its Google Glass, which allows users to take a photo with a "wink of the eye".
Google said the feature was faster than the camera button or the voice action and works even when the display is off.
The update to Google Glass, dubbed version XE12, also adds a screen lock feature and the ability to upload and share videos on YouTube.
Technology firms have been keen to capture the wearable gadgets market, seen by many as a key growth area.
Google said the wink feature in its Glass could have various other uses in the future.
"Imagine a day where you're riding in the back of a cab and you just wink at the meter to pay," the firm said in a blogpost.
"You wink at a pair of shoes in a shop window and your size is shipped to your door. You wink at a cookbook recipe and the instructions appear right in front of you - hands-free, no mess, no fuss," it added.