That's weird. Why? And since when?
Up until 2006, a player could get a medical exception to wear a tinted/shaded shield:
Exceptions must be documented by an opthalmologist with
the request signed by the player’s head trainer, athletics director and the
player’s parents or guardians if the player is under 21 years of age. The
finalized information is then under the jurisdiction of the head trainer,
who then will determine when it becomes public information.
The exception criteria was more stringent before 2005:
Exceptions must be documented by an opthalmologist with the request
signed by the player’s head trainer, athletics director and the player’s
parents or guardians if the player is under 21 years of age.
The request
is then submitted to a medical doctor designated by the NCAA
Committee on Competitive Safeguards and Medical Aspects of Sports
for review.