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
The cornea is a protective, transparent dome-shaped layer of clear tissue that covers the front of the eye. In corneal edema, it becomes excessively hydrated due to the accumulation of fluid. An adult cornea is about 0.5 millimeters thick.he cornea works like a powerful refracting medium, contributing to the focusing power of the eyes. It is kept clear by pumping of water from the endothelium layer. When there is water retention in the cornea area, it causes corneal swelling, which leads to corneal edema.