I'm sorry but that is not only a false statement and an irrelevant statement, also just plain silly.
Lasik surgery has NOTHING to do with whether or not humans are evolving.
From an evolutionary point of view, vision was only relevant if the vision would have been so bad that it would have kept the human from living long enough to reproduce.
Try thinking of some other example that is not quite as sophomoric.
Second, your example would not stop evolution, it would simply allow the increased likelihood of genetic defects that affect eyesight to get passed on, assuming some genetic defect that is so bad that it would have kept the human from knocking up some other human or from getting knocked up, and right off hand I cannot think of a vision defect so bad that it would keep a girl from getting knocked up.
Is that example really the best one you can come up with?
Anyone so limited that they can only spell a word one way is severely handicapped!