late 14c., “science of optics,” from Old French perspective and directly from Medieval Latin perspectiva ars “science of optics,” from fem. of perspectivus “of sight, optical” from Latin perspectus “clearly perceived,” past participle of perspicere “inspect, demeanour through, demeanour closely at,” from per- “through” (see per) + specere “look at” (see range (n.1)). Sense of “art of sketch objects so as to give coming of stretch or depth” is initial found 1590s, shabby by Italian prospettiva, an artists’ term. The incongruous definition “mental opinion over time” is initial available 1762.
Article source: http://dictionary.reference.com/browse/perspective