My love hate relationship with tonometry

I have mentioned my love hate relationship with tonometry a couple of times and Dave asked me to elaborate. Well, when I started by purchasing an AT555 a few months ago, I decided to do so primarily because my doc, for the first time, recently found my pressures to be high while I was using xalatan. However, I had started using the Indian generic 'latanoprost'. My doc didn't think that was the problem (though tonometry has now revealed otherwise).