As far as i concerned, you'd better not treat your black eye with ice, which can not do work for your eyes even make them worse. The basic problem for black eyes is due to the extravasated blood remains which effect the circulation around eyes. You might feel comfortable and relief at the first moment as you put ice on your black eyes, but as a matter of fact, it is heavy influence the circulation of blood. However, our main sake exactly is stimulating the blood circulation inner the body, which will be good for the recovery of black eyes. The fast blood circulation will let the black eyes get release. Therefore, ice is not a good choice. If I were your, I would rather put some tea bags instead, which is effective more or less.