Quote: mikej "Apart from the obvious requirement for refs to have glasses, the one I heard mentioned last night was it had a tiny camera on them. At ref debriefs (and I suppose maybe even at disciplinaries) it means they can actually see what the ref could see.'"
I can confirm Thaler was indeed wearing glasses that contained a small camera during the first half. The 'ref cam' will be worn by all referees during live sky games this year (dependent on them working!)
Source: I'm friends with the touch judge.