A curved optical eye shield removably attached to a single set of arms that connect to an elastomerically operated tensioning system that is an integral part of ahead mount system. The eye shield rotates from a normal viewing position to an out of viewing position above the forehead. The rotation of...http://www.google.es/patents/US6481025?utm_source=gb-gplus-sharePatente US6481025 - Elastomeric tensioning system for head and ear mounted eyewear
Elastomeric tensioning system for head and ear mounted eyewear
