Best for: Dryness that drops can’t seem to tackle.
How they work: Tears, your eyes’ own lubrication, are made up of water and an oily substance produced by glands along the eyelids. “If cells in the glands harden and plug the opening, it can keep the oil from getting into the tear film,” says Stephen Pflugfelder, an ophthalmologist in Houston. “Without that oil, the water in tears evaporates too quickly, leaving eyes feeling dry.” A warm compress helps liquefy plugs so the oil can flow into tears.
How to use them: Place a warm, wet washcloth over your eyelids for up to 10 minutes once a day as needed.