Wearguethatthestudyofhumanvisionshouldbeaimedatdetermininghowhumansperformnaturaltaskswithnaturalimages.Attemptstounderstandthephenomenologyofvisionfromartificialstimuli,althoughworthwhileasastartingpoint,canleadtofaultygeneralizationsaboutvisualsystems,becauseoftheenormouscomplexity