Introduction: doing phenomenology -- Indians and the elephant: phenomena and the phenomenological reductions -- The visual field: first phenomenological excursus -- Illusions and multistable phenomena: a phenomenological deconstruction -- Variations upon deonstruction: possibilities and topography -- Expanded variations and phenomenological reconstruction -- Horizons: adequacy and invariance -- Projection: expanding phenomenology -- Interdisciplinary phenomenology -- Epilogue -- Pragmatism and phenomenology -- Simulation and embodiment -- Multistability and cyberspace -- Variations on the camera obscura -- The seventh machine: bow-under-tension