swollen eye lid

[DK]

I have a bantam cochins hen that in the front part of her eye is swollen up with a chessy looking stuff it got as big as a marble under the eye lid her eye look fine.I was going to cut it open and see if it would come out but she kept moving her head so i just mash on the lump and a big chessy ball came rolling out from under her eye lid.The lump is gone but know she has bubble in the corner of her eye and some yellow looking stuff. I have taken her out from the other chicken until I can find out what this is. DK