tdbc,

Welcome to NeuroTalk. It sounds like your are hitting the midlife version of PCS. As the brain ages, brain injuries from one's youth tend to become more prominent.

The testing your are asking about would be a NeuroPsych Assessment. It can diagnose your processing and other neurological functions. You also may benefit from a neuro-ophthalmological exam. Fluorescent light have a flicker that can be fatiguing.

Stress of any kind can make these symptoms worse. Sickness, emotional stress, physical stress, cognitive/mental stress, can all reduce the brain's ability to function.

Tell us more about your symptoms and the vitamins you take. We may have some advice to improve your brain's ability to tolerate day to day activities. You should try to limit caffeine, alcohol, MSG, artificial sweeteners, aluminum based antiperspirants, and a few other things. I'll comment more later after your respond.

My best to you.