Ptolemy, in his treatise Optics, held an extramission-intromission principle of vision: the rays (or flux) through the eye formed a cone, the vertex getting within the eye, and the base defining the Visible discipline. The rays ended up sensitive, and conveyed info back to the observer's intellect about the space https://paging-system72592.acidblog.net/61049351/not-known-details-about-eyeglass-places-near-me