I had LASIK - they cut a flap in the cornea and laser underneath it. It was nervewracking, but not painful. They put anasthetic eye drops in - they last about 1 hour. After that my eyes were sensitive to sunlight, I had to wear sunglasses, and they were red, gritty and watery for a few hours, but the next day was fine. LASEK (no flap) is more painful afterwards - the soreness lasts longer, but you do have lots of drops to use for a week - antibiotics, steroids to reduce the swelling and lubricating drops to help alleviate dry eyes.
Best thing I have ever done. I am amazed that I have gone from being very shortsighted, and with astigmatism, to having near perfect vision in a little over two weeks (the corneas are still healing, so it will be up to 3 months before my vision is completely stable.)