Another vote for visiting your doctor, make a list of your concerns about the reaction times and any other cognition issues you notice. My mom voluntarily gave up her driving and the state license a few years back, she realized that her eyesight and her reaction times were getting worse. We just take turns taking her where she needs to be.

It can be a forerunner of other conditions that you aren't even thinking about, Parkinson's Disease has a slowed reaction and cognition time element to its various symptoms. I am hyper aware about this, now. If I notice a problem, that will be it for my license, voluntarily. Not wanting to be a statistic or front page news about the guy that kills or injures a group of people, needlessly.

Good on you for realizing the signs of a problem, just get answers now. Best of luck.

Bill