disparity


Also found in: Dictionary, Thesaurus, Legal, Wikipedia.
Related to disparity: desperateness, Health disparity

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 ?
d](P) denote the matching cost for pixel (P) at disparity level d, [K.
Although, in absolute terms, the highest disparity in Labour productivity was measured in 2008, the same as with GDP per capita; there was no decrease in the disparities in Labour productivity to the level of 2004 by the end of the reporting period.
In order to evaluate the economic disparity among counties of the states (not including Alaska and Hawai), the units of analysis will be counties in each given state to find out the differences in terms of economic well-being.
Other forms of disparity appear to be frowned upon.
In this situation, management of any institution (commercial or non- commercial organizations) should be learned to handle this disparity and utilize disparity to accomplish the corporate objectives.
The lawyers argue that the disparity in the value of votes in Japan's 47 prefectural electoral districts is unconstitutional.
The study found that hospitals that incorrectly report heart disease as the cause of death were more likely to treat white people than black people, leading to the assumption that there is less of a disparity in heart disease deaths.
For example, in assessing levels of physical activity across socioeconomic groups, the "individual choice" theory would undertake to determine the degree to which residents of certain neighborhoods (usually low income) have less access to safe recreational facilities, thereby diminishing the ability of residents to maintain sufficient levels of physical activity, before determining whether the disparity would be considered unjust.
Issues addressed and described include patient-provider communications, differences in medical management, patients' perceptions of discrimination by health care workers, the disparity of underrepresented minorities in the health care workforce, and the near absence of minorities in clinical trial research.
For instance, the increase in disparity among employed men may be due in part to an increase in the number of men employed only part time, which may reduce their access to health care services compared to full-time employees.
DHBs' stated general intent to achieve health equity is not usually accompanied by any detailed information about disparity in the district or the size of the disparity for Maori," the report stated.