Foveal diplopia thresholds and fixation disparities
نویسندگان
چکیده
منابع مشابه
The locus of fixation and the foveal cone mosaic.
High-resolution retinal imaging with adaptive optics was used to record the position of a light stimulus on the cone mosaic, with an error at least five times smaller than the diameter of the smallest foveal cones. We discuss the factors that limit the accuracy with which absolute retinal position can be determined. In five subjects, the standard deviation of fixation positions measured in disc...
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Two experiments show that eye fixations land nearer to the beginning of misspelled than correctly spelled beginning words during sentence reading. The effect holds regardless of whether the previous word is easy (high frequency) or difficult (low frequency) to process. In Experiment 1, the misspelled words were directly fixated. In Experiment 2, a saccade contingent change technique was used su...
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Turning off a fixation point prior to or coincident with the appearance of a visual target reduces the latency of saccades to that target. We investigated this 'gap effect' when subjects fixated a central point or the center of a square formed by four points that were 4, 2 or 1 degree eccentric from the square's center. The fixation anchor vanished 200 ms prior to the appearance of a saccadic t...
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Long-term rotational vestibulo-ocular (VOR) adaptation occurs during systematic dysmetria between visual and vestibular afferents, adjusting eye-rotation angular velocity to re-establish retinal stability of the visual field. Due to translational motion of the eyes during head rotation, VOR gain is higher when fixating near objects. The current study measures VOR in humans before and after 6 mi...
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The site of normal fixation is often assumed to be centered in the foveal avascular zone (FAZ). This assumed anatomic relationship is used during photocoagulation therapy as an objective guide to avoid damaging critical retinal structures on or near fixation. With laser therapy being directed closer and closer to the center of the FAZ, the accuracy with which the center of the FAZ locates the r...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1981
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03206146