Here's the scenario. Three people sitting at their computers with Glancing running: Blue, White and Red. That's what the eye looks like on everyone's computer.
The way you look to see who's around you is by opening the menu, and there are their names there. Just by looking to see who's around, seeing their names, Glancing understands that as a higher activity: it's a glance. So Blue does this, opens the menu.
Then the eye opens on everyone's computer.