dark circles

Do you know how to remove dark circles around the eyes? I'm looking for ways how to augment my hubby's dark circles. He may have gotten it when he was assigned during the night shift which he had a hard time adjusting to. You can really see in his eyes how stressful things are. It doesn't help that his body clock was having a hard time adjusting to the schedule. Anyway, it's a good thing that my sweetie is back in the normal shift and work has not been as stressful as before.