Ptolemy, in his treatise Optics, held an extramission-intromission theory of eyesight: the rays (or flux) from the eye fashioned a cone, the vertex becoming within the eye, and the base defining the Visible field. The rays were delicate, and conveyed info back again into the observer's intellect about the distance https://pagingsystem77666.activosblog.com/29254003/not-known-factual-statements-about-best-sound-bar