On the free edge of the eyelids of the eyes are the Meibomius glands (30 to 40 in the upper eyelid and 20 to 30 in the lower eyelid), elongated, secreting a thick lubricating gel that, when dry, forms a binding material known as legañas , which collects in the corners of the eyelids. This secretion traps dead eyelash epithelial cells, dust and other particles, preventing them from reaching the eye.
In some countries of America they are called "lagañas".





