CONCEPT
The Optic Array
Gibson's technical term for the <em>structured field of ambient light</em> available at any point of observation — not photons in flight but light already organized by surfaces, textures, and occlusions into patterns that specify the layout of the world.
The optic array is the foundational concept behind Gibson's rejection of the retinal image as the starting point of perception. Classical vision science treated the eye as a camera receiving a flat, inverted image to be computationally reconstructed. Gibson argued this was a laboratory abstraction — a fact about isolated eyeballs, not about living organisms. A moving observer encounters not a snapshot but a continuously shifting pattern of structured light, the ambient optic array, which contains information about distance, layout, motion, and surface properties that is unambiguously specified without requiring inferential enrichment. Texture gradients specify distance; optic flow specifies locomotion; progressive occlusion specifies which surface is in front. The information is in the light itself, available for direct pickup by any perceiver moving through the environment.
In The You On AI Field Guide
The optic array displaces the retinal image as the unit of perceptual analysis. The retinal image is momentary, bounded, and impoverished — a flat