I'm about 13 months into my concussion, and this symptom recently returned for me as well. I was actually stopping by the forum to post about the same issue. I work from a computer, and I can barely get anything done. I'm falling behind on bills, and it's making me nervous. I need this to go away ASAP.

I also keep the screens very dim, and I changed that setting on my iPhone that you're referring to. I am frustrated that this symptom has returned.