weepy eye on chick

[TINA123]

I had a chick hatch, two weeks ago, in good health except for a weepy eye. I kept it clean with alittle warm water and a Qtip. Yesterday i heard loud chirping form the chick cage, when i went to investigate, i found my baby flopping on the floor of the cage chirping loudly. I pulled her out and within a few seconds she was dead.I mean it just died right there in my hands I was floored. this baby seemed fine except for the eye, which didn't seem like a big deal. Was this some kind of respiratory illness or a heart attack, or maybe some kind of abnormality going on inside. I am crushed, I have been trying to raise Astralops as meat birds and this was the first to hatch. Anybody have some advise as to what could be going on?