DALLAS-Talk about the effects of the hard hits pro ballers take on the field have caught the national spotlight and we're not talking Friday Night Lights.
No, with the upcoming release of the movie "Concussion," it's making those in the NFL pay closer attention to players' repetitive head injuries.
But perhaps more importantly, is the awareness it's raising in players.
"The traumatic brain injury is scary and I had three significant concussions my last year in the league in 2011 and each time it took more to feel normal again," admitted David Vobora, former NFL Linebacker.
Vobora knows the signs and symptoms of head injuries well.
"I played for four years and four games in the league, ended up blowing out my shoulder in that fourth game with the Seattle Seahawks," he said.
"There was times when I would hit someone and open my eyes and everything would be green."
For Vobora, those hard hits now equate to finding ways to treat areas of the brain that are no longer stimulated like hyperbaric chamber therapy.
"You're under pressure in a chamber breathing 100 percent oxygen and it fully saturates the blood vessel," says Dr. Alfred Johnson of the Hyperbaric Centers of Texas.
Dr. Johnson says the numbers of player injuries is significantly less than the days of leather helmets thanks to better equipment and increased awareness, but he says players should always practice safe techniques on the field.
"Well the prevention part of a concussion is play your sport the way it's supposed to be played, you know, don't lead with your head in football," he says.
Now Vobora is focused on treating injuries he suffered more than four years ago.
"It’s what comes with the game but again you have to be mindful of what's most important," said Vobora.”