It isn't my eyes, it's my brain. Even though I'm easily distracted by errors in the written word (spoken, too), and am often ASKED to proofread things for other people, I have days when I can go over and over something I've written and STILL miss something that should have been obvious when I typed it!

For instance, I can type "abilitly", re-read it three times and all three times see it the way it should be, "ability".

I make plenty of mistakes, so what? But what really bugs me is when I go back and check, and still don't see it. Grrrrr.