Cite as:
Köpsel A, Rinkenauer G, Grosjean M, Huckauf A, 2010, "Distribution of visual acuity around fixation: Measures in real 3D space" Perception 39 ECVP Abstract Supplement, page 160

Distribution of visual acuity around fixation: Measures in real 3D space

A Köpsel, G Rinkenauer, M Grosjean, A Huckauf

Knowledge about depth acuity is necessary, among other things, for evaluating 3D display technologies. Although the distribution of visual acuity along the horizontal and vertical dimensions has been well studied, acuity in real depth has received little attention. We developed a method to investigate and compare visual acuity in the peripheral visual field and in depth. Optotypes were presented tachistoscopically at various positions to the left and right of fixation (horizontal dimension), below and above fixation (vertical dimension), and in front of and behind fixation (depth dimension). The latter manipulation was achieved with the help of a semipermeable mirror. Stimuli were observed monocularly. As expected, recognition performance declined with increasing eccentricity at the three depths that were used (front, fixation, back). There was, however, an asymmetry in depth: Mean performance was best at the front depth, intermediate at fixation and worst at the back depth. This pattern is consistent with the notion that human depth acuity is observer- rather than object-centered.

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