5 EASY FACTS ABOUT OPTICIANS NEAR ME DESCRIBED

Ptolemy, in his treatise Optics, held an extramission-intromission concept of eyesight: the rays (or flux) from the eye shaped a cone, the vertex being within the attention, and the base defining the Visible field. The rays had been sensitive, and conveyed details back again to your observer's intellect about the space and orientation of surfaces.K