> What do you expect when a laser cuts into your eye? Technically, it's a femtosecond laser that's sculpting the surface of the lens of your eye using ablation

> What do you expect when a laser cuts into your eye? Technically, it's a femtosecond laser that's sculpting the surface of the lens of your eye using ablation (i.e. pulse of laser light disintegrates an area the diameter of laser). A "3d scan" of your eye (tomography) done prior to surgery is done while sitting to create the surgical plan. But the lasik procedure is performed while laying down. And since the shape of your eye is a lot like a water balloon... the shape of your eye changes between sitting and standing. A more accurate surgical plan / tomographic profile could (in theory) lead to better patient outcome simply by having both procedures done while standing.