Embodiments of the invention comprise an eyelid preparation, a method for producing the eyelid preparation, a method for treating or preventing eyelid conditions and a method for applying an eyelid preparation on human eyelids or eyelashes. The eyelid preparation may be used to treat ocular conditions, such as blepharitis, dry eyes and dysfunctions of the meibomian glands, associated with an infestation of Demodex mites. The eyelid preparation consists essentially of therapeutically effective amounts of an essential oil and a dermatologically acceptable carrier.