This article is interesting, its about a new type of contact lenses that can help to correct short sight. Unlike normal contact lenses you wear them at night. They help to reshape the eyeball by pressing on the eyeball and correcting the problem that causes short sight. The interesting thing is that because they correct your sight overnight, they do not have to be worn during the day. The lenses are basically like normal gas permeable or hard lenses rather than the soft type. They are shaped to the contours of your eyeball and then press on the cornea reducing the curvature and restoring it to the shape of normal vision. They do need to be worn every night because the effect is temporary and the eyeball will gradually spring back to its original shape. Whilst I can see it might take some getting used to wearing lenses whilst you sleep, this seems like a good idea. The lenses are suitable for people with short sight and a prescription of -5 or less.