the invention of linear perspective is generally attributed to
Filippo Brunelleschi Filippo Brunelleschi (Italian: [fiˈlippo brunelˈleski]; 1377 – April 15, 1446) was an Italian designer and a key figure in architecture, recognised to be the first modern engineer, planner and sole construction supervisor.[4] He was one of the founding fathers of the Renaissance. He is generally well known for developing a technique for linear perspective in art and for building the dome of the Florence Cathedral. Heavily dependent on mirrors and geometry, to "reinforce Christian spiritual reality", his formulation of linear perspective governed pictorial depiction of space until the late 19th century.[5][6] It also had the most profound – and quite unanticipated – influence on the rise of modern science.[6] His accomplishments also include other architectural works, sculpture, mathematics, engineering, and ship design. His principal surviving works are to be found in Florence, Italy; however his two original linear perspective panels have been lost.
Lens (anatomy) The lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances, thus allowing a sharp real image of the object of interest to be formed on the retina. This adjustment of the lens is known as accommodation (see also below). Accommodation is similar to the focusing of a photographic camera via movement of its lenses. The lens is more flat on its anterior side than on its posterior side.