I've been following these pool eyeglasses/contacts discussion on here for awhile. I've had terrible vision most of my life, and was wearing high prescription contact lenses when I first started playing pool in my early teens, and I saw perfect. I'm thirty now and wear contacts 95% of the time, my vision is mostly fine outside of pool, but over the last couple years it seems like my vision really deteriorated when shooting. I was just seeing blurred balls and my eyes were straining and becoming irritated at futilely trying to focus the edges of the ball to be crisp. Went to the optometrist and my prescription hadn't changed.
I was thinking about investing in billiard glasses, too, and was researching it on here. But the consensus then seemed like if you can wear contacts, it is far superior to wearing glasses. And one member here commented to not overlook the value of good lighting on the table -- and to bring some brighter bulbs to your room and have the owner install it on your favorite table.
I do have a table at home, and when I installed it, I had made a quick lighting solution that seemed to work, but looking at it closer, there was clearly a lot of dim shadows. So, I decided to take money I would invest in billiard glasses (that may or may not work for me) and at least invest it in good diy lighting. It's still a work in progress, but man, it worked like a charm and I could finally see the balls clearly again. The bright lights on the table cleaned up so many vision issues I was having. Only issue is that some of the other places I shoot do have dimmer lights. I don't know if it'll work for your situation, but wanted to throw it out there. Nothing worse than not being able to see what you're doing in something you love that is based off seeing what you're doing.