Keeping a cat indoors in a flat :/. So cruel.
it depends on the cat. would you let a blind cat outside in the middle of a city?
at least the op is aware of his situation and is trying to get a cat that is ok with being kept inside.
we had a white cat, a kilowatt bulb of loving affection but deaf as a post, we really should have kept him inside but he was a roamer, and needed to go out.
he was run over by a car at less than a year old, left do die in a bloody mess in our neighbors garden had they not the heart to come and tell my mother who managed to get him to a vet for the necessary injection.
to this day i wish i'd done the "cruel" thing and forced him to stay indoors, he would have learned to cope and would have spent more than half his life as a happy cat, rather than the emaciated stray we took him in as.