Exiting a Lens
To go back to the Lens Explorer look at the palm of your left hand. The menu button will appear which when pressed with your right hand will give you the option to Exit Lens, Save to favorites on the Lens Explorer, or close the menu to return to the Lens.
Other selectable options on your palm are to close the Lens, or to add to your Saved Lenses for quick access from Lens Explorer.
Note: if you the Lens uses the mobile controller you will need to exit through the Spectacles app. You'll find the exit button in the top right corner of the app.