Some birthmarks are from extra color (pigment) in the skin. Other birthmarks are blood vessels that are bunched together or don't grow normally. It's not clear why some children have birthmarks and others don't.
a thickening of the cornea may indicate swelling swelling usually occurs from damage to the back the layer of the cornea associated with aging trauma or disease of the eye the swelling can be observed for progression or medically treated with topical hyper osmotic agents
Because the cornea is as smooth and clear as glass, but is strong and durable, it helps the eye in two ways: 1  It helps to shield the rest of the eye from germs, dust, and other harmful matter. 2  The cornea acts as the eyeâs outermost lens. It helps to shield the rest of the eye from germs, dust, and other harmful matter. 2  The cornea shares this protective task with the eyelids, the eye socket, tears, and the white part of the eye (sclera). 3  The cornea acts as the eyeâs outermost lens.