>>10643087 >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.