I heard of this procedure not to long ago where they implant a micro thin band in your eye, and it reshapes your eyes so you get better vision. It is totally reversible and if your eye changes they can change the size of the implant at any time to correct for it. So it is suppose to be really safe. Though since it is done by reshaping the eye there are some limits to what it can do. It costs a little more than lasik though.

A Safe, Flexible Alternative To Laser Surgery - Intacs Corneal Implants for Keratoconus and Myopia