Catflower,
I am pleased to report that I had the same problem in big, open and enclosed places such as Walmart or the grocery store.
Looking back on it all, it seems as if my depth perception, hearing and balance were all rolled in to one. As soon as I would enter a place like that I felt like I was a bit disorientated and sort of lost in space. I knew that the problem was related to my hearing but I really couldn't put my finger on what was ailing me. I complained about it constantly to whoever would listen to me. I'd interview total strangers at length in an effort to solicit opinions and diagnose myself. The problem gradually got worse and worse until not ony my sight and depth perception were being seriously altered, but I was staggering around like a drunk with double vision. I remember several times when it was at its worst. The first was when my girlfriend took me out to a premier showing of Bruce Campbell's movie "The Man With The Scrambled Brain" - how mysteriously apt! - at which the actor himself was present to talk and meet and greet. I was a wreck. I remember getting out of the car and leaning on my girlfriend as we walked toward the theater. I remember looking at the bustle of people and cars moving around me and feeling like I was going to die, thinking, "So this is what it feels like to be near the end....." I was amazed at how, after going in to a sushi restaurant for a bite, I was revived by the food, only to relapse a few hours later. The next time was when I went in a Walmart to buy an air conditioner. My head, depth perception, hearing and balance were completely skewed. I knew I was at the end of the line.
I am happy to report that all of that weird, cloudiness has gone away since my surgery. But that is only in my case. As you can see, others have reported that they hadn't experienced anything like it until after their surgery.
Hope you get through it okay.......Paul