Eccentric vision : adverse interactions between line segments

J.J. Andriessen, H. Bouma

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    Abstract

    The paper deals with adverse interactions between line stimuli ineccentric vision. Bothcontrast thresholdandjust noticeable difference of slanthave been measured for a test line as a function of the distance from a number of surrounding lines. Test lines were either parallel or perpendicular to the surrounding lines. It turns out that theinterferenceaffects both contrast threshold and j.n.d. of slant with a clear-cutorientational specificity. The surprising result is the extensive spatial range of the interference: between parallel lines it operates over retinal distances of about 0.4?t, degrees, where?t, is the eccentricity of the test line. Large-distance interference limits eccentric spatial vision in daily life much more than classic visual acuity limits would indicate, and makes eccentric vision probably quite different from "unfocussed" foveal vision.
    Original languageEnglish
    Pages (from-to)71-78
    JournalVision Research
    Volume16
    Issue number1
    DOIs
    Publication statusPublished - 1976

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