Playing by the Rules
The NFHS rules specify that the football eye shield must consist of a molded rigid material such as polycarbonate. Flexible acrylic or plastic is not permitted, as force of impact could cause the shield to buckle or tear, causing injury to the player. The only other NFHS stipulation on visors states that they must be clear, with no evidence of tint. A game official questioning visor tint may slip his game data card behind it, which will reveal any shade of color.