How about using the screen of the computer as points, for example, you can create a video with the flickering white light of the desired frequency and to look at him.
Is there any sense of this?
I think I'm not the first one that came to mind
There is a check mark to instead of glasses flicker of a computer screen (such programs very much, by the way - I have the old record of more than a dozen, the same shrink, neuroprogrammer, strobe).
Machine dreams is still more effective, as does the screen refresh rate is imposed and a bunch of other factors...