The skin around the eyes is constantly losing moisture through the epidermis. As water is lost, plump, youthful cells become dry and shriveled. This hydration loss is apparent via fine lines and wrinkles.
Traditional eye creams lock in moisture by using 3 types of substances:
Occlusive agents are hydrophobic compounds like waxes, oil and silicons which stop water evaporation by coating and creating a barrier over the top layer of the skin.
Emollients are fats which get absorbed into the skin and fill in the dry areas in between skin cells to restore moisture and smooth skin out. Examples are saccharide isomerate and capric triglyceride.
Humectants are hydrophilic, which means they attract moisture from the air and the lower layers of the skin, and then trap it in the epidermis. For instance, glycerin, sodium hyaluronate and, of course, water.
Eye creams can benefit the skin in a variety of ways and do much more than simply help hydrate dry skin. When applied correctly, they boost hydration to prevent flaking and dullness, repair damaged skin cells, reduce dark circles and bags, boost collagen to plump out fine lines and wrinkles, as well as, provide a protective layer of moisture to protect the skin against challenging external elements such as sun damage (if used during the day time hours).