Deuce,

I think you may be onto something when you consider allergies. They can effect all kind of things. Meds can compound these problems. I can have blurry vision in the morning that takes a while to resolve.

There are no degenerative vision problems that result from a concussion. Rather, vision problems caused by a concussion start at their worst and tend to get better as inflammation settles down and the brain heals.

The pressure necessary to damage the optic nerve would cause an excruciating headache. So, try to let go of these anxieties. You'll do better if you do.