>>10215913 >sOme peOPlE finD IT dIFfiCuLT to UndErstanD HoW WE CaN See thE WORLD PropERLY wHeN The imAgE IS upSIDe DOWn. THe RIGht waY To ThInK ABOUT tHIS Is TO AdOPt A COMputATIoNaL pERsPEctiVE. We dO nOt peRCeIVe What Is on THE RetIna; insTeAD, A pErCepT iS FoRmEd THRough a coMpLex ChaiN Of NeUral COmputATIONs. a COntroL cOmPUtEr doES NOT care WhICH wAY IS uP, aND invERSiOn of thE ImaGe IS The lEaSt OF THe BRaiN's cOmPUtatIoNaL pRObLEMS.