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
So the cornea is too thin to undergo LASIK. If LASIK were to be carried out, there will be an increased risk of corneal ectasia because of the thin residual stromal bed, which will only be 182 micrometers thick, well short of the 250 micrometers recommended by the US FDA.