A rigidity map - that will keep certain areas static in response to auto-generated morphs, or cause them to morph in response to a reference. However, I doubt that would fully avoid the need for custom morphs - the goggles cover a lot of face, and many morphs will affect some parts of that area and not others so keeping it fully rigid would look wrong. To define a rigidity map select the vertices you want to keep static with the Geometry Edit tool, then right click and go to Polygon Assignment>Create Rigidity Group from Selected.