A non-sterile device intended to be placed over closed eyes to apply heat for the treatment of meibomian gland dysfunction (MGD), dry eye syndromes, blepharitis (inflammation of the eyelid), and other related ocular conditions. It is typically in the form of a mask-shaped fabric envelope which contains a heat-retaining substance intended to be heated in a microwave oven prior to use. This is a reusable device.