Is this just your ability or do you have some professional medical background? This is not an antagonistic question. It’s just that if you have a,professional medical background, it would add credibility to your opinion.
Nope. Just a gut feeling I get. Take it for what it’s worth.
My own analysis is only anecdotal, but I only have seen this “look” twice before in my life and they were both from my dear elderly mom. The first time, she was suffering from a grand mal seizure. The second time, was during the last week of her life. As with DoughtyOne, I noticed this in him last summer and would speculate a neurological condition, for sure. Might be prescription psychotropic drugs, too.