Those telescopic eyes look kind of awesome. But it does sound like the technology still has a long way to go. Only two thirds of people saw "notable" improvement. Meaning one third saw no improvement (or possibly even deterioration) after months of rehabilitation, and among those who saw improvement I imagine a lot of it would fall under the category of minor. Which seems like a pretty big risk considering that the operation does not look reversible. But then again, if you can't see already...