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
What is the cornea? The cornea is the clear, protective outer layer of the eye. Along with the sclera (white of the eye), the cornea serves as a barrier against germs and other elements that can harm the eyeâs delicate components. The cornea is also the most important tissue for vision. All light that enters the eye is bent, by the cornea. If the cornea becomes damaged through disease, infection, or injury, the resulting scars or discoloration interferes with vision by blocking light entering the eye.