disparity

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dis·par·i·ty

(dis-par'i-tē),
The condition of being disparate.
[L. dispar, dissimilar]

disparity

The condition of being unequal or totally different. The word is used mainly to refer to non-corresponding points in the retina. See retinal disparity; retinal corresponding points.
binocular disparity See stereoscopic visual acuity; retinal disparity; depth perception.
crossed disparity Retinal disparity induced by an object nearer to the eyes than the point of fixation and focused on the temporal retina. Thus, the image received by the right eye appears to the left and that received by the left eye appears to the right. Syn. crossed retinal disparity.
fixation disparity See retinal disparity.
retinal disparity Binocular vision in which the two retinal images of a single object do not fall on corresponding retinal points, i.e. when the object lies off the horopter. If, however, the two retinal images still fall within Panum's area, the object will still be seen single. At the fixation point this may cause over- or under-convergence of the eyes. This particular case is called fixation disparity (or retinal slip). The presence of fixation disparity often indicates that binocular vision is under stress and the patient has an uncompensated heterophoria. Optical correction or orthoptic exercises usually eliminate the symptoms. Fixation disparity can be measured either (1) directly (e.g. Disparometer, Wesson Fixation Disparity Card, both consisting of targets with pairs of vernier lines of various angular separation, each line being seen by one eye through polarizing filters), or (2) indirectly as an associated phoria (e.g. Mallett fixation disparity unit). Syn. binocular disparity. See stereoscopic visual acuity; anaglyph; esodisparity; exodisparity; fusional movements; depth perception; random-dot stereogram; stereopsis; stereotest.
uncrossed disparity Retinal disparity induced by an object farther away from the eyes than the point of fixation and focused on the nasal retina. Thus, the image received by the right eye appears to the right and that received by the left eye appears to the left. Syn. uncrossed retinal disparity.
vergence disparity See motor fusion.
References in periodicals archive ?
Reducing disparities based on social factors may improve health care quality more than marginal improvements in overall medical care.
The declines in incidence of HIV infection among black women and adolescent females signal some progress toward reducing racial disparities among women, and these findings are consistent with previous research that indicated reductions in racial/ethnic disparities in diagnosis of HIV infection among women during 2010-2014 using different measures of disparity (absolute rate difference, diagnosis disparity ratio, and index of disparity) (4).
For each of these three measures, we estimate within-hospital disparities for two social risk factors, dual eligibility for Medicare and Medicaid ("dual eligibility") and race.
The effort zeroes in on two of Utah's most underserved urban communities --the Salt Lake City neighborhood of Glendale and the city of South Salt Lake --and leverages an existing outreach program known as Bridging Communities and Clinics, a partnership-driven strategy that the Utah Office of Health Disparities created to widen access to culturally compe tent health services.
In order to obtain the dense disparities of above-mentioned pixels, we adopt the window-based matching algorithm.
Jung's study [10] investigated the brain activities in different locations while viewing stereoscopic images with different screen disparities. They found that the crossed disparity near -1 degree activated the right inferior parietal lobule (IPL; BA 40) and the right middle frontal gyrus (MFG; BA 6), which was in accordance with Tsao's study [28] in 2003.
The literature provides mixed results on the study of growth disparities --their extent and nature; based on different approaches and its main objectives.
It is crucial to recognize how economic well-being of a state is identical to sharp disparities among cities within particular socio-economic indicators.
In this paper we focus exclusively on the analysis of the existing transfer system in China and aim to provide both quantitative and qualitative assessments on the existing regional fiscal disparities and the overall equalization effect of the transfers system.
This legislation also improves maternity care and outcomes by supporting research on the causes of disparities in maternal morbidity and mortality and on how maternity care services can reduce these disparities.
The goal should be simply to make the inevitable disparities as tolerable as possible for everyone, independent of whether you are average, exceptional, or challenged by any particular standard.
The Table below illustrates the practical consequences of various absolute disparities. It shows the black population in several Michigan counties.