The unfathomable richness of seeing.

Many hold that visual experience is sparse and its richness illusory, relying on high-level summaries rather than detailed content. However, we argue here that seeing is more than this - it is unfathomably rich. We distinguish three levels of visual phenomenology: high level object and scene categorizations; mid-level feature groupings; and a fundamental spatial field composed of spots and their spatial relations. Crucially, we argue that seeing objects requires seeing the groupings that compose them, and that seeing groupings requires seeing the spatial field that grounds them. Even the most basic feeling of spatial extendedness implies rich phenomenal structure. It follows that much of what we see cannot be used, reported, or remembered. And yet we see it.