Hi Velorian,
I've learned almost by accident that my third eye will close if I aske it. Inside my mind I say, "Third eye, I need you to close now." And it does.
My issue isn't computers (that I'm aware of) but the emotional "junk" of other people. My work is a combination of accounting and IT, so I need to be able to focus on the facts and logic. In meetings, most people have some sort of energy relating to their jobs, whether it's frustration, boredom, anger, whatever. My third eye picks up on all that, and then I struggle to pay attention to the facts. Asking it to close takes care of that.
Seldom have I asked my third eye to open, but I've found that when I focus on something, it opens on its own.