Medieval Italy's Eyeglass Inventor Remains Unknown Despite Historical Accounts
The invention of eyeglasses in late-thirteenth-century Italy is a significant historical development, yet the identity of its original inventor remains a mystery. While convex lenses and reading stones were known prior to this period, the breakthrough involved mounting two suitable lenses separately, joining their frames, and positioning them directly in front of both eyes. Early eyeglasses, designed primarily for presbyopia, consisted of two convex lenses in individual frames connected by a central rivet, resting on the nose without arms. Dominican preacher Giordano da Pisa, in a sermon from February 1306 in Florence, claimed to have met and spoken with the person who first discovered and practiced the art of making spectacles less than twenty years earlier, placing the invention around 1286 or the late 1280s/early 1290s. However, Giordano's sermon does not name the inventor or explicitly state that the invention occurred in Pisa. Further evidence from the Chronica antiqua conventus Sanctae Catharinae de ... 
