Newt,
I'm not sure what your condition is but from your post (wearing glasses after 40 and your mention of Lasik surgery) I would guess it is Presbyopia.
If so, I recently read an article on a new treatment that's going through the FDA process which may (or may not, depending on the final results) rectify this condition entirely (or at leat almost).
I only mention this because if this methodology proves to have merit, then it may be worth your while to hold off on the Lasik surgery for a while.
I'll see if I can locate the article again.