@Foster What's it like, if you don't mind me asking?
Well, the concussion was just blackness (didn't even know I was hit). When I came-to pretty much while being hauled into the ER I didn't quite immediately realize just how much blood was pouring out my ear.
>Being deaf...
Everything is quieter. But not consistently. Some frequencies get through better than others. Particularly anything with a lot of bass. The brain can compensate for this and still direction-locate, but it generally requires you to turn your head and hope you hear the exact same sound a second time (and hope it isn't moving).
>Being blind...
Glaucoma. A pressure-spike tends to cause migraines, which include the feeling that you're one sudden-movement from vomiting violently for however long it takes to fix that [can take several days without meds]. Visually, there's a "blind-spot", not so much a tunnel as a persistent gray fog in what should very well be in your FoV. And it never really shrinks, it just gets bigger as the years pile-on.
If it's only one eye (in my case, my previously dominant one), blinking can reset your dominant eye to the one that sees better; since your brain interprets the fog as standing with your hand over that eye.
Thankfully, I've still got peripheral vision from that eye where it matters (out to the left) and it's as clear as it was from before I was diagnosed with it. But as noted, it's only really a matter of time and making too many mistakes for that to change for the worse.
Naturally, this has caused me to adopt the pararescuemen's motto in the event of an emergency.
Which when combined with all the other mottoes I've lived by turns into:
*Do your best to be prepared to be unprepared at the worst possible time, so that others may live.
-I'm not dead yet; try to keep up. What one man can do, another can do.
I'm just lucky, I guess.