Washington Redskins rookie linebacker Su'a Cravens created a buzz with his play in the first four games, making big plays. He caused another buzz on social media Tuesday, leading to questions about the severity of the concussion he suffered in Week 4.

Cravens posted a video on Snapchat in which he said the concussion impaired his vision and led to him having to get glasses.

"Due to my concussion, my eyes have lost the memory to keep track of moving objects, so I have to wear these for the rest of my life," Cravens said in the video.

Fresh pair of prescription glasses on this road to recovery ! #httr pic.twitter.com/M2fQuX90dQ — Su'a Cravens (@Sua_Cravens) October 11, 2016

Cravens remains in the concussion protocol and was scheduled to visit an independent doctor Tuesday. Redskins coach Jay Gruden will address the situation Wednesday at his regularly scheduled news conference.

Cravens suffered the concussion in Washington's win over the Cleveland Browns on Oct. 2. A week earlier, he clinched a win over the New York Giants with a diving interception in the final minute.

A concussion can cause vision problems, among other issues. NASCAR driver Dale Earnhardt Jr., also a big Redskins fan, remains sidelined with balance and vision issues brought upon by a concussion.