There's a reason the NFL has made a concerted effort to significantly reduce head injuries and concussions, and Washington Redskins rookie Su'a Cravens is living proof.

Cravens, a standout defensive player for the Redskins this season, said on Snapchat that he now has to wear glasses all the time due to a concussion he suffered in Week 5. Additionally, Cravens said this regarding his prognosis.

"Due to my concussion my eyes have lost the memory to keep track of moving objects, so I have to wear [glasses] for the rest of my life."

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Fresh pair of prescription glasses on this road to recovery ! #httr pic.twitter.com/M2fQuX90dQ

— Su'a Cravens (@Sua_Cravens) October 11, 2016

This sounds like an extremely serious situation, and it will certainly impact not only Cravens' ability to perform on the field, but also his life away from it.

Redskins head coach Jay Gruden announced last week that Cravens is in the concussion protocol, and given the damage done to his eyes, he'll likely remain in it this week, too.

The 21-year-old linebacker-safety hybrid was on his way to a promising rookie campaign and had aspirations of winning Defensive Rookie of the Year.

This concussion is extremely unfortunate and serious, but it's important for him to take care of his health before worrying about football.