I think this is a stupid question. Just because you can't 'see' something doesn't mean it's not there. Remember that we have 5 sense, not just one, so if you can't see it, then you can hear it or smell it or touch it or taste it. If someone was blind deaf and dumb, do you think that they think nothing exists outside of themselves? I don't think so, ever read about Helen Keller?

It's a moot question, and I think the question you're really asking is whether or not our senses are lying to us, or whether we live in some sort of illusion. But I think we're all getting a little carried away with this illusion stuff. I'm a firm believer in reality. If it's there, it's real. it may not be real to someone else, but if it's real to me it's all that matters.

In one of my classes today we were talking about witchcraft in Africa, and some authors brushed it off and treated it as a figment of people's imaginations, that witches and curses don't exist. Other authors claimed that if it's real to them, then it is indeed real. I can tell you with certainty that they don't exist to me, because I don't believe in them, but they certainly exist to millions of Africans who believe in it very strongly.

If you want to believe the world stops existing when you close your eyes, go right ahead, but I know I still exist...