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 the clear tissue that covers the front of your eye. It lets light into the eye, helping you focus and see clearly. If your cornea is injured, or you have a disease or inherited condition, it may become cloudy, distorted or scarred.orneal edema (swelling) Your cornea can swell after cataract surgery, or if you have certain corneal diseases such as Fuchsâ dystrophy or keratoconus. If it is not treated, this swelling can cause blurry vision. Tiny blisters can form on the surface of your cornea, and these can be very painful.