Can We Trust What We See

One day we open our eyes and there it is.
The world opens up to us, all that we can see.
We move within our view, learning as we go.
But can we trust what we see? Is it real? What is "real" anyway? Does anyone really know? Quantum scientists tell us at the quantum level reality is probabilistic. What? The fundamental nature of reality cannot be determined? Does this mean reality has no substance and all we see is just an illusion? Are we constructs in a fuzzy reality that's just a sum of probabilities. Are we just ghosts in a universe of possibilities? What are the odds of that?