A vacuous stare, sometimes specifically directed towards any online multiplayer game; especially Call Of Duty. This stare could be directed towards other objects of interest as well. ex: a sandwich, a woman/man, or anything demanding extreme attention.
I was playin' Modern Warfare last night, you shoulda seen my Duty Eyes.
Doctor, its worse than I thought, just look at them Duty Eyes.
My dog has them Duty Eyes, she won't stop staring at my sandwich.