Cascade Optical is the name of an optician's shop in Michigan, USA. They have been in business since 1993 but the drop temple glasses look as if they were made during the mid 1980's so there may be no relation with the shop in question. Perhaps a different brand simply called these glasses "Cascade"? Whatever the case, these are elegant glasses indeed. A comparison with the nameless drop temple glasses featured in the previous series reveals some of the development in frame design between the 1970's and the 1980's.