A study investigating why Necker cubes are also bistable in binocular vision.

What is it about?

The study investigates the remarkable but not appreciated observation that Necker cubes are bistable during binocular vision too. Bistability is remarkable because one would expect disparity information to render Necker cubes unambiguous. Measurements of perceptual dominance durations lead to a model explaining bistability. The model also explains the longstanding but unexplained finding in binocular vision that the spatial limits are different for binocular fusion (single vision) and stereopsis (depth perception).

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Why is it important?

The result provides insight in processes underlying binocular vision. The proposed model predicts independent processing of binocular information for fusion and depth perception.