Has anyone seen this before?

DD currently has a nasty cold and has been crying all day (seriously). Both eyes tear up but the left one REALLY tears up - much more than the other. And can tear up when the right one doesn't. At firt I thought it might be conjunctivitis because one of the bubs at Mothers Group had it - but there are no other symptoms...

Anyone seen this? Any ideas?

TIA

MG