That means you'll go in and sit in a waiting room until it's your turn. When it is, tehy put you into a comfy chair, put in an IV and ask you to point to the eye you need surgery on and you'll get a Sharpie dot on your forehead above it. When you go into the OR, you'll get a shot to put you under for a few minutes while they numb your eye and begin the op. If you wake up during, like I do, you'll see a lot of bright, swirling colors as they remove the cataract and put in a lens. Then they patch the eye with gauze and put a hard covering over it. You need to go back the following day to have your vision tested. Most docs will tell you to wear that hard covering over your eye at night, so lay in a supply of bandage tape.
Recovery is fast. You'll be light sensitive for a while, that cataract is blocking a lot of the light that gets through along with blurring your vision. You'll be home with your kitty, she'll hardly know you left for a while. She might hiss at you a couple of times because you smell like the VET, but don't take it personally.
You'll need someone to drive you to and from the surgery and to and from the doc's office the next day. Check out your yellow pages, there should be medical transport services listed, half the people in Florida are older than god and need them frequently. They'lre not ambulances, they're just cars with drivers who know enough to take you to an ER if you pass our on the way, which you won't.