Remember Bokodes, MIT's tiny replacement for barcodes and the like? Their holographic nature enabled them to represent different information from different angles, and it's this property that allows the tech behind them to be used in a very different and even more useful way: figuring out just how busted your vision is. The Camera Culture team at MIT's Media Lab evolved that tech into a $2 box that refracts the image displayed on a smartphone screen. When combined with an app that displays a set of dots and lines, the user can manipulate the ima
