Correct blur and accommodation information is a reliable cue to depth ordering.

a Ferroelectric liquid-crystal polarization switch, b Birefringent lens Bias: sharp boundary, blurred texture perceived in front. Limitations: correct blur only if viewer accomodates to display screen. unrealistic blur. Stimuli used in Experiment 1. (a) Volumetric presentation: two flat textures (chosen among four) displayed in separate focal planes (distance 1.2 D), blur produced by accommodation. (b) Single-plane presentation: two flat textures displayed in same focal plane, artificially rendered blur (1.2 D). Monocular presentation. Tas k: W hich tex ture is i n fr ont ?

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[2]  C. A. Burbeck,et al.  Occlusion edge blur: a cue to relative visual depth. , 1996, Journal of the Optical Society of America. A, Optics, image science, and vision.