I believe one can never see the world "as it is"; this is simply a pretty idea that does not exist as to be human is to be influenced deeply and irreversibly by one's environment, upbringing, and circumstances. Contrary to the popular belief, though, this isn't and shouldn't be viewed as a bad thing. But then again "good" and "bad" are also subjective :)
In any case, my depression is just another lens through which I view the world.