Well, I don't think they haul those around with them, do they? It's not exactly a run of the mill occurrence. People who have those restrictions on their licences usually can't see if they don't have their glasses on and that's the end of it. There's really no need for police to carry around eye charts! That's the purview of the DMV, not enforcement. Of all the drivers on the road, few have had the surgery and then been stopped.
Don't you love it, though, that while giving you the ticket the cop told you how lucky you were that he was being a good guy and not doing the worse thing by taking you to jail?
Seriously, just submit the proof of surgery and/or retake the eye test and get your licence reissued.