somebody must have already done it, right? Well, yes, but earlier efforts have looked more like diving goggles than something you could, you know, wear in public. The Harry Potter-esque TruFocals, on the other hand, are (only just) acceptable looking and operate via the golden slider you see above. By tweaking translucent fluids between a pair of lenses for each eye, it alters the distance at which the specs focus, sort of like having your very own zoom function. The price for such flexibility is $895, which inventor Stephen Kurtin considers a sterling bargain, and we've got video of him after the break explaining just how awesomely revolutionary his product is.