ocular dominance


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ocular dominance

The use of one eye by choice for particular tasks such as aiming a gun. This may or may not be related to right-hand or left-hand dominance.
See also: dominance

dominance, ocular

The superiority of one eye whose visual function predominates over the other eye. It is that eye (called the dominant eye) which is relied upon more than the other in binocular vision. It is not necessarily the eye with the best acuity. The lack of ocular dominance is referred to as ambiocularity and such a person is ambiocular. See manoptoscope; occlusion treatment; hole in the card test.
References in periodicals archive ?
Stryker, "Distinctive features of adult ocular dominance plasticity," The Journal of Neuroscience, vol.
Sengpiel, "Homeostatic plasticity mechanisms are required for juvenile, but not adult, ocular dominance plasticity," Proceedings of the National Academy of Sciences of the United States of America, vol.
In Figure 2, the results of moderate exercise on the effects of short-term ocular dominance plasticity are summarized.
Ocular dominance plasticity measured before and after this heavier exercise is shown in Figure 3(c) as black lines/open circles and red lines/filled squares, respectively.
Ocular dominance plasticity in adult animals can also be reinstated by increasing excitation.
In order to quantify ocular dominance, for each subject and each experimental block, we computed the average duration of exclusive dominance of each stimulus, called mean phase duration, as well as the average duration of mixed percepts.
(14) Kommerell and colleagues distinguish between ocular dominance and ocular prevalence as follows: "Ocular dominance manifests itself in tests that contain stereoobjects with a disparity beyond Panum's area, for example, in pointing a finger.
(21-22) Kommerell et al found that there was agreement in 75% of the individuals between the eye that was 'dominant' according to the ocular dominance (sighting) and ocular prevalence tests, although the sample size was small (20 participants).
Previous studies have shown that 7 days period of monocular deprivation in fluoxetine-treated adult rats is sufficient to bring about a change in the ocular dominance. To reveal early transcriptional changes that precede and underlie the functional change, we analysed gene expression, using DNA microarrays, at two days after MD.
Similarly, ocular dominance was not found to be significantly different (Chi-square, [chi square]=0.85, p=0.50).
The degradation of extracellular matrix components known as chondroitin sulphate proteoglycans (CSPGs) by exogenous administration of the bacterial enzyme chondroitinase actually reinstates ocular dominance plasticity in adulthood [74], probably by modifying dendritic spines dynamics and associated neuronal connectivity changes in the visual cortex.
There have been many theories over the years about possible relationships between the results of tests of ocular dominance and reading problems.' A difficulty is that there are many different tests of ocular dominance (Figure 4) and the eye that is dominant in a given person will vary with the task, and indeed from one moment to another.