These days the machine itself should also warn if it's on too long, so perhaps the operator was relying on that. These days even UV treatment gets added to your record so that further treatments don't accumulate too much. Well, it does in the UK at least.
> UV treatment gets added to your record so that further treatments don't accumulate too much
Which also takes into account how much time you spend outside during daylight hours, right?? That seems like such a large confounding variable that it renders the hospital-side measurement kind of pointless...
