Actually, vision changes in pregnancy is very common. With normal pregnancy (all the hormones and such). I mean it affects like every part of your body - nothing works like it usually does when you are pregnant.
That being said, it is usually temporary and returns to normal after. So I wouldn't wait.
I haven't seen the point of Lasik but my vision is rather good. I don't really mind my glasses anyway so I don't really see the point. Being that "blind" I would most certainly go for it though. Everyone I know who got the procedure LOVES it and I hae a lot of doctor clients who perform the prcedure (have been for a long while). I guess it is pretty common around here. Everyone always asks me why I still wear glasses...
I would consider getting it done down the road when technology improves. But I can't justify the risks for now. & it kind of grosses me out. I had a relative who they did not give her enough drugs and she was a little freaked out about the whole thing. She has sufficiently freaked me out though ideally you should be too drugged to care they slicing your eye up.
But as I don't expect my eye sight to improve with age I figure it is something I will consider in a decade or 2.
Good Luck.