Lady, I know what you mean about dark rooms. I have a night light for every room and make sure the night lights are turned on every night.
I can't do showers very well because of having to close my eyes. It's the same problem you have--I lose my balance.
Without my glasses I can't see much at all, and it's hard to wear glasses in the shower though I've done it. They get all wet of course!
I need to be able to see in case I drop the soap.
It looks as if some of us are stuck with some symptoms ...