Nevi may be congenital or acquired. They may grow during puberty or pregnancy. A congenital form is the split nevus or kissing nevus of the eyelids. Nevi may be amelanotic. Nests of nevus cells may be at the interface of the epidermis and dermis (junctional nevi), into the dermis (compound nevi) or lose all connection with the epidermis and only be in the dermis (intradermal nevi). These last ones are usually amelanotic. Back to Eyelid