NOT KNOWN DETAILS ABOUT EYEGLASS PLACES NEAR ME

Ptolemy, in his treatise Optics, held an extramission-intromission concept of eyesight: the rays (or flux) in the eye fashioned a cone, the vertex staying within the eye, and the base defining the Visible subject. The rays were sensitive, and conveyed information and facts back for the observer's intellect about the gap and orientation of surfaces.