Sorry, but you're wrong! The reason you can't see the dust is just that it's out of focus. The proof: stand behind a chain-link fence and take a picture of a distant object with a camera... can you see the fence in your picture? Answer, no (the camera has no brain and therefore it's dissappreance has nothing to do, in this instance, with visual filtering).
I think I am right in saying that it will be utterly impossible to read anything produced on the contact lens display, this is EASY to prove. Just see how close you can bring a text-book to your face before you can't read anything. I'd wager that, unless you are shortsighted, this will be about a hands-width away. Now imagine trying to focus on text at the front of your eye-ball displayed on the surface of the cyber-lens. Sorry, no way!!
[I'm sad because I am right]