A joke about “contact” sports is:
 
Q: Why don’t football players wear glasses?
A: Because it’s a contact sport.
 
“It seems wrong to wear glasses in a contact sport” was cited on Twitter on March 16, 2011. “Why don’t hockey players wear glasses? Because it is a contact sport!” was cited on Twitter on July 11, 2011. “Football is a contact sport; that’s why you never see anyone with glasses playing it” was cited on Twitter on June 13, 2012.
 
   
Twitter
Stroke of Penius
‏@strokeofpenius
It seems wrong to wear glasses in a contact sport.
2:21 AM - 16 Mar 2011
 
Twitter
Greg Lyons
‏@gplyons
Why don’t hockey players wear glasses?
.
.
.
.
Because it is a contact sport!
5:50 AM - 11 Jul 2011
 
Twitter
Abbie Marie Hudson
‏@MissAbbieHudson
‘I only wear glasses when i’m playing tennis. It’s a non-contact sport.’ < that is comic genius from the one and only @joe_butcher1 :'D

8:17 AM - 6 Apr 2012
     
Twitter
The PUNter
‏@thepunterpuns
Football is a contact sport; that’s why you never see anyone with glasses playing it.
5:28 PM - 13 Jun 2012
 
Twitter
Tom
‏@ForgottenHeath
Why aren’t the glasses allowed to play football?
It’s a contact sport.
11:31 AM - 31 Mar 2015
 
Twitter
Collin with two ‘L’s
‏@PolemiCol
I just realised why football players don’t wear glasses; it’s a contact sport.
#daboomtish #tw (via Facebook http://ift.tt/1dLrKBb )
10:58 PM - 22 Aug 2015
 
reddit
Why don’t NFL players wear glasses?
submitted December 29, 2015 by 12345_PIZZA
Because it’s a contact sport.
 
reddit
Why don’t any American football players wear glasses?
submitted May 22, 2016 by GeneralTso123
Because it is a contact sport!