In comparison to other animals, our nervous systems are also rather slow.
If seeing is believing…
What kinds of things could we be missing?
How do we know that the things we are sensing are REAL?
As a TOK student, how is your perception limited?
Also, consider this:
Atoms are made up of packets of energy, which are invisible with no mass or size. Also, every object is 99.9999% empty space at the atomic level. So at a deeper level, your hand is just invisible vibrations taking place in a void, which go in and out of existence millions of times per second.
How does this alter your view of reality?
 Deepak, Chopra. How to Know God. New York: Harmony Books Inc., 2000.