Every Human being constantly processes information during his cognitive activity. Once this information is systematized (generalized), it acquires a new status — now it’s knowledge (“life experience”) of this particular Human being.
That’s why people reflect (“see”, feel) the outside World, and each of them does it in his/her own way (from his/her own “point of view”, “with his/her own eyes”).
Every person admits the existence of only those things he underwent by himself, then thought through, turned over in his mind, thought out, passed through, felt out, created, etc., that is, he cognized and realized something without any assistance.
If a human being did cognize and did realize “something”, then this “something” definitely exists for him!
If a human being didn’t cognize and didn’t realize “something”, then this “something” doesn’t exist for him at all!
All systematized and generalized feelings of a person are his consciousness (memory). There can be nothing more! This is the World of a human being he “lives” in.
P.S. If we imagine a meeting of two people, whose consciousnesses contain completely different information, they will not be able to communicate with each other, since they will have nothing to talk about, because these interlocutors live in “different Worlds” (they perceive the World “with different eyes”).