The Centers for Disease Control estimates that around 2.8 million people in the United States suffer from a traumatic brain injury (TBI) every year, and vision can be affected.  Concussions are a type of TBI.

The rate of childhood TBI visits to the emergency department more than doubled between 2001 and 2009, making children more likely than any other group to go to the ER with concussion symptoms.

It was once assumed that the hallmark of a concussion was a loss of consciousness. More...

So you’re going about your day and notice a slight twinge when you blink. It starts off as a mild awareness, then proceeds to a painful feeling with every blink. You look in the mirror to see what could be causing it, and there you see a small red bump forming.

You decide to wait to see what happens and one of three things occurs. It might get bigger, redder, and more painful; it might shrink and goaway; or it might stay put, but it is no longer painful or growing in size. Let’s dive into...