Alva Noë argues that perception is not a passive internal process but a form of skilful bodily activity. His central claim is that perceiving is something organisms do: perceptual experience depends on sensorimotor knowledge, meaning an implicit practical understanding of how movement changes sensory stimulation. Vision, therefore, should not be modelled as a camera-like input that the brain converts into an internal picture of the world. Instead, it is closer to touch: a dynamic exploration in which eyes, head, body, environment, and action jointly constitute experience. Noë’s examples of cataract patients and reversing goggles show that sensation alone does not guarantee perception. Patients whose sight is surgically restored may receive visual stimulation without yet being able to see meaningfully, while subjects wearing distorting lenses initially experience chaos until they adapt to new sensorimotor patterns. These cases support his idea of “experiential blindness,” where sensory input exists but lacks perceptual content because it is not integrated with embodied skill. Noë also challenges the input-output model, according to which perception is input, thought is mediation, and action is output. The conclusion is that perceptual consciousness is enacted: the world becomes available through practical bodily engagement, not through detached internal representation alone.
