As presented in the previous chapters, glass has been used not only for artistic expression, but also for a wide variety of utilitarian ware and containers. Furthermore, as outlined in Chap. 7 , glass has been applied to a range of chemical apparatus and the development of laboratory glassware, particularly as a result of improved glass provided first by the glassmakers of Venice and Murano and later by glassmakers of the Bohemian forests. Of course, the quality and clarity of the Venetian glass also led to completely new and important objects such as lenses. In fact, some have stated that the most important long-term consequence of the manufacture of clear glass was its development as a thinking tool through the production of mirrors, lenses, and eyeglasses [1]. Through its application in eyeglasses, glass has corrected and helped preserve our eyesight, and its use in the telescope, microscope, spectrometer, and other optical instruments has widened and deepened our ability to see that which is outside the capabilities of natural sight, from the very small to that far away [2]. This final chapter will outline the application of glass to the development of such additional critical objects and instruments, along with a discussion of how these developments have impacted both society and progress in the sciences.