I was having trouble with my eyes-- swelling, tearing, itchiness-- went to the doctor, who prescribed drops (zylet) for what he diagnosed as a chalazion. The zylet worked great as long as I took it; as soon as I stopped, the problem returned. I sought a second opinion, and this opthamologist looked at both my eyes, and she said I had blocked oil glands in both eyes. On the one that was really bad, she worked to unclog the oil gland.