Internet rule: there is xkcd of it. But actually, I found mention of communicating via eye movement here: http://daniel.erlacher.de/index.php/Time_required_for_

Internet rule: there is xkcd of it. But actually, I found mention of communicating via eye movement here: http://daniel.erlacher.de/index.php/Time_required_for_motor_activity_in_lucid_dreams http://daniel.erlacher.de/index.php/Time_required_for_motor_... But that's a bit too low bandwidth for me ;)