If I want wit, I'll go to a comedy forum. I'm a whiz with one-liners, and that's often all a guy at my level can provide here, but when one of the reputedly best pool instructors in the country repeatedly fails to provide real substance to our queries on these "ask the pro" forums I have to question their intent for being here.
Sorry, Randy, but that's how I see it.
As far as glasses go, you may or may not have an extreme diopter prescription as I have, or many other myopes have. I have a good friend who needs little correction for distance but he has bad astigmatism. His lenses don't curve straight lines like mine do, but he can't see shit without them.
Then, there is the matter of refractive index of the lens material. The new high-index polycarbonate lens that they sell you because they are thinner and lighter (and much more profitable for the optician) give some folks fits with edge curvature. That's what I have. I prefer glass lenses but they aren't recommended for folks who work with machinery like I do, especially since a disaster in my good eye would leave me in a pretty hopeless situation in the world. Lightning can indeed strike the same person twice.
At any rate, contacts are the very best vision correction you can get, but they really aren't that healthy for the eyes in many people. You need to go to a good ophthalmologist for a contact exam IMHO, not some mall kiosk optometrist.
I saw a very interesting interview with Steve Holcolm this week. Steve's the guy who steered us into two bronze medals in bobsled at the Sochi Olympics. Steve suffered from a severe eye disorder called keratoconus. Keratoconus is a thinning of the cornea that eventually leads to blindness. Steve hid his disorder from the public and even from his teammates until it got to the point where he could barely see his hand clearly in front of his face. That's about how bad my right eye got before my surgery.
Steve decided to quit racing for his own safety, and that of his team. The only option available for keratoconus has been corneal transplants, which restore vision to a degree but not good vision. He was lucky enough to be offered a trial of a radical technique where a special contact lens was installed inside his eye rather than being worn on the outer cornea like a traditional contact lens. Miraculously, he was able to see 20/20 for the first time in his life. In his own words, "It was like life in HD."
Now, here's the really intriguing part. With his sliding career finally back on track (a little wit there for ya

), he set out to train like never before to get ready for a repeat gold at Sochi. Much to his chagrin, he discovered that his vision was now too good for steering the sled. By turning his runs into visual guidance rather than going by feel, he was hitting everything in sight (more wit).
The answer? He started wear a scratched up old visor to reduce his visual acuity and he stopped hitting walls and started get smooth, fast runs again.
CJ has been pointing to stuff like this since he arrived here, but it's falling through the cracks with all the hoopla about TOI and "hammer strokes". This is a feel game, and obscessing over perfect mechanics and perfect vision is just not going to get you where you want to go all by itself. You really do need to "be the ball" at the higher levels. Hard to do when your trying your best to see the ball as something clearly and distinctly not you.
Sorry for the lack of brevity. I've always been a man of "however many words it takes to get my point across".