He is also a diabetic and it gets worse if his sugar gets to low, his eyes flutter and head shakes a bit but if his sugar is to low then it’s more often, I check his sugar when he does it just in case it’s low, does your cat do the same thingI just Googled it and probably got the same generalizations you did as well as a lot of YouTube nonsense. What else is going on? From what I read it can be anything from a facial tick and worse. I got lost in neurology world so I have a real interest in this but I can tell you for certain a lot of diagnoses are based on guesswork and observation. In spite of how that might sound I'm not being negative and my own story is way too long and not relevant right now. Best of luck.