I'm not a doctor, but it sounds like some kind of major straining behavior showing up in his body. You know the Lasik didn't "fix" whatever made his eyesight bad, just postponed the inevitable, so now it may be manifesting elsewhere. Doctors are often trained to put you in a category: does he have arthritis? Does he have heart disease? etc. and then prescribe some appropriate medicine, then try some other medicine if that doesn't work to suppress the symptoms. Bates relaxation work like palming sure won't hurt (it cured non-visual problems for Bates' patients) and in general I'd get this guy to walk outside and think happy thoughts and look at his life and behavior for his major stressors, then see what he can do about reducing those. Just my opinion -- I am not a doctor. good luck.
Thanks! I'll talk to him about that when I see him in a little over a week.