i am not sure if it was the epley maneuver. i youtubed the epley and it did not involve moving the head quickly right and left. i did ask about the crystals but he did not think that was the problem. he tried to explain but i didn't totally understand what he saying. something to do with degradation due to aging or maybe circulation issue? i just found some articles re hs-sot (head shaking-sensory organization test). i think that is what was done to me. he stopped the shaking abruptly to gauge the aftereffects in my eyes. that might a diagnostic tool but i will not let that be done to me again even though i have felt fine since the exam. it's not normal for the head to be shaken like that and i don't want any risk of brain injury. i hope he has enough to go on already. he gave me some eye exercises. tx unaluna!