The concept of a smart contact lens has been around for a while. To date, though, they haven’t been all that comfortable: they tend to have electronics built into hard substrates that make for a lens which can distort your vision, break down and otherwise cause discomfort. A team of Korean scientists might just come to the rescue. They’ve developed a smart lens that could help diabetics track blood glucose levels while remaining stretchable enough to be comfortable and transparent enough to preserve vision.