Exactly, I wouldn't have known that liquitabs were a 'do not pass go, head straight to A&E' potential emergency before I read this thread. I might have thought it was a and a 'right, let's wash your eyes out'.
dh once took ds to the science museum for the day. Ace play area there where there are all sorts of things for kids to do. ds and dh stayed until closing time, got all the way across London on the tube, and all the way out of London on the train... it was only when they turned up at home that ds announced 'um, I've got something in my eye... ' and we realised he had a bead stuck.
It was a bit like a plastic lentil, flat on one side, raised on the other, so impossible to coax out of his eye with a tissue. Tried rinsing his eyes out, tried (very very carefully) tweezers, nothing worked. Ended up spending several hours in A&E, with a harassed nurse occasionally breaking stride as he walked past us and asking 'have you got it out yet?'
Eventually they were about to breach the four hour waiting time target and decided to try to clear all the 'not immediately life-threatening' stuff. I was kind of relieved that it took the nurse several different implements and many, many, many goes to fish the dratted thing out - at least it showed dh and I weren't completely incompetent (although I did tease dh that he deserved a neglectful parent prize for not noticing at any point on the two-hour-long journey home... to be fair it may well have been one of those things that hides behind your eyelid and pops out later).
I like to think we aren't completely crap, and I had thought the science museum play area was a fairly safe place... we got caught out, I don't see why there's so much smugness on this thread about parents being caught out by not realising how dangerous liquitabs can be.