I am considering ulthera for my brow to help open my eyes, lift outer corner of the brow to avoid upper lid lift. Just concerned that some say ulthera ruined their face. I am sure that equipment age, cartridge age and technician experience play a role. Also concerned about heating my brow when my brain is a centimeter away? Will the heat penetrate to the brain? Has this been studied with theragraphy? One person heard that it could cause brain damage. Is there any truth to this?