Can he put a visor on his helmet then?It was reported that he had a rubber pellet lodged in his eye, and had played a few snaps with it before being pulled. He was treated with an eye treatment at halftime that required dialating his pupil, which causes the blurriness, and light sensitivity, hence the "blurred vision", and inability to play the second half.
If you've ever had your eyes diallated, it makes sense. You can't see for crap for hours.
RBs used to put visors on their helmets to prevent getting their vision impaired.