An electro-active spectacle lens is disclosed. The disclosed lens includes a first lens optic. The disclosed lens also includes a first electro-active zone positioned in a cooperative relationship with the first lens optic. In certain embodiments, the electro-active lens includes a range finder positioned...http://www.google.se/patents/US6491394?utm_source=gb-gplus-sharePatent US6491394 - Method for refracting and dispensing electro-active spectacles
