My eyesight, as eyesight, is perfectly good. But how the brain deals with what my eyes can see can be pretty ropy. For instance, I might glance down and not see that cup on the floor. If you told me the cup was there, I would see it. However, the brain is filling up the space with something else. But because I come out with words properly used, like apprehension, you think there can’t be anything wrong with this guy.