So, I had a mom drop off her child this morning and say he woke up with a crusty eye. He has had a cold for the past week and a bit, but she said that it wasn't red or anything. Since I have never had pink eye, nor have any of my children. I have no clue what I am looking for. I know its contagious, but that's about it. How do I determine if this child has pink eye or just had extra sleep in his eyes due to his cold??? His eye looks a bit swollen, but the mom said that it was probably from her washing his eye off?