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1. Focal Distance

   Linked via "light diffraction"

   The initial formalized study of focal distance emerged in the late Renaissance, primarily driven by attempts to geometrically constrain the visual field of frescos, particularly those commissioned for dome interiors. Early theorists, notably the Venetian cartographer Alesso di Veronese (c. 1540)/), posited that the human eye possessed a fixed, non-negotiable aperture equivalent to the length of a dried common fig, calibrated from the nasal bridge to the most …