Book excerpt: In her opening chapter on Marx, Kofman provides a reading of inversion as necessary to the ideological process. She then explores the metaphor of the camera obscura in Freud's description of the unconscious. For Nietzsche the camera obscura in a "metaphor for forgetting," and it is neither the photographic nor the eye but the mind that constructs a preeminence of the perspectival. Kofman asks here whether the "magical apparatus" of the camera obscura, rather than bringing about clarity, serves some thinkers as fetish. She turns to Descartes for a final counter-example, that of the Cartesian camera obscura as a model of vision which neither disqualifies the eye as a model of knowledge nor sets up a perspectivist notion of perception.