Why don't QBs wear Visors?

<img src="http://www.nfldraftdog.com/2008_nfl_draft/Colt%20Brennan.jpg"></img>
<img src="http://media.collegepublisher.com/media/paper872/stills/j36z3l25.jpg"></img>
<img src="http://i182.photobucket.com/albums/x97/soxanddawgs/general%20sports/colt-1.jpg"></img>
<img src="http://farm4.static.flickr.com/3085/2373731613_5196381c0e.jpg?v=1207455668"></img>
<img src="http://monkeyinmymind.com/wp-content/uploads/2008/08/colt-brennan-redskins.jpg"></img>

I've wondered this question for a long time now too. They always talk about "reading the QB's eyes." How can defenses do that if they can't see it? I know if I were a QB, I'd wear the rainbow ones, like what Colt's wearing in the Senior Bowl pic.

I've had the biggest man-crush on this guy for about four years now. I wish on a daily basis that this guy would be a Saint, and be next-in-line after Drew. Pro scouts compared him to be a "taller Drew Brees."