inscription, 'Here lies Salvino Armato, the inventor of spectacles'. The inscription is probably inaccurate since both the Ancient Greeks and the Ancient Chinese were aware of the properties of crude forms of lenses in correcting visual defects. In medieval times, however, spectacles did first come in to use around the beginning of the fourteenth Century, during Armarto's lifetime. With the advent of printing and greater literacy in the population, the demand for spectacles increased.