Well I don't need to see much.... As long as I can tell where the other people in the pool and the walls are, that's all I need to be able to see....
I don't wear my glasses while swimming, so my head under or above water, I can't see much anyway.
Once I and my sister-in-law were in the pool at our house and she asked what time it was. I said there's a clock over there, and pointed to the wall. She didn't see it and asked me to just tell her what time it was, and I was like, I'd have to get out of the pool to get my glasses and I'd be cold.... Look, over there... that big orange and black thing. She didn't want to make me get out of the pool so she waited for my brother to come back out so she could know what time it is.