Can tight ends wear visors

Answer 1

Under NFL rules, any player may wear a visor as long as it's untinted. Special approval (and usually a doctor's prescription) is required for tinted visors.

NCAA (college) and NFHS (high school) rules go a little further in that they also specify that the visor must be "rigid" (and, as far as I can tell, there's no provision whatsoever made for tinted visors; the visor must be clear and untinted). However, they don't place any restrictions on which positions are allowed to wear them.