Until computers became so common, I don't think there was a lot of use for glasses that changed focus when you looked from side to side. And even now, it seems like the kind of hack a programmer would come up with, but that would seem "unnatural" to others. And it could be dangerous if you used them while driving. --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://glassyeyes.blogspot.com!
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