Not sure of THE reason, but at the time, an opposing coach complained about his defensive backs not being able to see the offensive player's eyes, giving the offense an unfair advantage.
the reason is it draws attention to individuals in a team atmosphere. asked a player today. not because mud might get on them.
I wore one for 2 days in practice when I was in High School. They don't really fog up or anything, I just found I couldn't see as well through the tint, so I ditched it about halfway through the 2nd practice.
Don't know how to post a link, but found an answer at: en.allexperts.com/Football-instruction-2069/2008/7/TintedVisors.West.htm It was given by Vic Winnek, an NCAA Football official. He said it was for safety. If a player had to be assessed, for opening and closing of his pupils, a tinted visor could obstruct the light shined into the players eyes. Thus, the helmet would have to be removed, unnecessarily jostling the players neck. It was recommended by their medical safety committee. Tinted glasses, goggles, or contact lenses are OK, since these could be removed for evaluation, without moving a players neck.
in high school you cant wear tinted ones for safety.if you are knocked out the drs have to see your eyes withOUT taking off helmet I POSTED THIS A WEEK AGO
That was my personal experience wearing the visor. I played DB in high school and I wear contact lenses. I tried the visor to make sure I wasn't poked, etc. ...it was BRUTAL! I ended up HATING it! Everytime you hit, sweat from your face flung forward and onto the visor. It fogged, grass would stay stuck to it should it get wet....I tried RainX to get it to bead--but it just makes a distraction. My visor experience lasted about 2 weeks....ended up having one of the equipment managers cut it off mid-game because it was so annoying....