Technology and science. Part. III
Progress in optics Thanks to the rediscovery of ancient works, or the discovery of the writings of Arab scholars, some sciences experienced great growth. This was the case with the optics. One of its applications would change the lives of many people: glasses. The first glasses are called vesicles, derived from beryl, the transparent gemstone then used for lenses. They had no branches, but the lens frames pivoted and pinched the nose to fix themselves. It is likely that the use of concave and convex lenses, which increased the possibilities of the human eye, is much older...