When I had glasses, I'd shoot upright. When I got contacts 6 years ago, I slowly moved my stance down to where it is now chin on cue.
So I had lasik surgery in Sept. Suddenly I needed glasses again

but I decided to NOT change my stance to higher. I got some rimless glasses and played with the adjustment some, so now I see through the very top of them. I always clean the right lens (dominate eye) and don't worry about the left so much.
I suggested elsewhere that you can wear a billed hat to lessen the reflection off the inside of the lenses. Ceebee suggested non-glare lenses. Both help.
Lasik works for most and I'd do it. In fact, I'm off to have a "do-over" next week to further correct my nearsightedness. I'll either see better or worse. The odds for trouble go way up on the second surgery.
The reason for the 2 - 12 feet depth of field is for the table, of course. But it is necessary because if you correct 100% for distance, then you won't be able to see the cueball very well, especially as you age. My doctor was befuddled by this request, too, but I''ve worked on him for several years and he finally gets it. All those letters after his name and he had trouble with this concept.
I'm of the opinion that because we Americans spend over 90% of our time INdoors, all corrections should be more like 20/30 than 20/20, but that's me. How often does modern survival require one to have to see across the prairie?
I'm the one who suggested trying various daily contact samples to find the correction for you for playing pool. Invest the time for this BEFORE surgery, as if you over correct your eyes, you're stuck for life with good distance, but poor pool vision.
Be patient, it's very important,
Jeff Livingston