Associated Press — Turning on Glass is done by tapping a finger on the right side of the frame. The device can also be activated by tilting your head upward. Glass users have to turn on the device frequently because it automatically turned off every 30 seconds or so when I wasn't using it. This is meant to save the limited battery life (it only lasts about 90 minutes if you're recording a lot of video, but Google says the battery should be adequate for a full day's use for most people).
Navigating the Glass software requires swiping a finger in a forward or backward direction or an upward or downward direction on the right side of the frame. Remembering the correct direction to swipe to get to a certain set of controls or information was confusing at first, but it didn't take long to get the hang of it.
Glass can connect to the Internet through a Wi-Fi network or by pairing with your smartphone through a Bluetooth connection.
Once online, it's easy to ask Google's search engine for a piece of information. I wondered how the Oakland A's fared in a game earlier that day and Glass promptly delivered the score on a card displayed on the display screen while I carried on a conversation. An automated voice also announced the answer through a bone conduction speaker near my right ear. When I asked Glass for directions to another location in San Francisco, it pulled up a map on the display screen and adjusted my course as I walked in different directions in the room.
The map was quite immersive because even though the Glass screen is small, the display is in high-definition and gives the illusion that you are seeing the image on something much larger. Google likens it to watching a high-definition TV with a 25-inch screen from eight feet away. I didn't have enough time with the device to test that comparison, but there's no doubt the picture on Glass display is crisp. People who are severely near-sighted probably won't be able to see what's on the screen any more clearly than everything else in front of them.