deviation


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Related to deviation: standard deviation, Average deviation

deviation

 [de″ve-a´shun]
1. a turning away from the regular standard or course.
2. in ophthalmology, strabismus.
3. in statistics, the difference between a sample value and the mean.
axis deviation an axis shift in the frontal plane, as seen on an electrocardiogram. There are three types: Left, from −30° to −90°; Right, from +90° to +180°; and Undetermined, which may be either extreme left or extreme right, from −90° to +180°.
conjugate deviation dysfunction of the ocular muscles causing the two eyes to diverge to the same side when at rest.
sexual deviation sexual behavior or fantasy outside that which is morally, biologically, or legally sanctioned, often specifically one of the paraphilias.
standard deviation (SD) the dispersion of a random variable; a measure of the amount by which each value deviates from the mean. It is equal to the square root of the variance. For data that have a normal distribution, about 68 per cent of the data points fall within (plus or minus) one standard deviation from the mean and about 95 per cent fall within (plus or minus) two standard deviations. Symbol σ.
ulnar deviation a hand deformity, seen in chronic rheumatoid arthritis and lupus erythematosus, in which swelling of the metacarpophalangeal joints causes the fingers to become displaced to the ulnar side. Called also ulnar drift. See illustration.
 Ulnar deviation (ulnar drift) of the metacarpophalangeal joint, a characteristic sign of rheumatoid arthritis. From Pedretti and Early, 2001.

de·vi·a·tion

(dē'vē-ā'shŭn),
1. A turning away or aside from the normal point or course.
2. An abnormality.
3. In psychiatry and the behavioral sciences, a departure from an accepted norm, role, or rule. Synonym(s): deviance
4. A statistical measure representing the difference between an individual value in a set of values and the mean value in that set.
[L. devio, to turn from the straight path, fr. de, from, + via, way]

deviation

Vox populi A departure from a norm. See Septal deviation, Standard deviation.

de·vi·a·tion

(dē'vē-ā'shŭn)
1. A turning away or aside from the normal point or course.
2. An abnormality.
3. psychiatry, behavioral sciences A departure from an accepted norm, role, or rule.
Synonym(s): deviance.
4. statistics A measurement representing the difference between an individual value in a set of values and the mean value in that set.
[L. devio, to turn from the straight path, fr. de, from, + via, way]

deviation

See SEXUAL DEVIATION

deviation

1. In strabismus, the departure of the visual axis of one eye from the point of fixation. 2. A change in direction of a light ray resulting from reflection or refraction at an optical surface.angle of d. See angle of deviation.
conjugate deviation The simultaneous and equal rotations of the eyes in any direction. It may be physiological such as versions, or pathological, due to either muscular spasm or paralysis. See disjunctive movements; version.
dissociated vertical deviation  (DVD) A form of strabismus in which one eye apparently moves vertically without any compensatory movement from the other eye. Although initially felt to disobey Hering's law, it is now felt that Hering's law is observed if the horizontal, vertical and rotational aspects of the condition are considered together. This form of strabismus often accompanies infantile esotropia and is almost always noted from the period of infancy. The misalignment can be either latent or manifest, and may require operative intervention if of a great degree. See Faden procedure; Bielschowsky's phenomenon test.
Hering-Hillebrand deviation The deviation of the apparent frontoparallel plane horopter from the Vieth-Müller circle (horopter) (Fig. D2).
minimum deviation of a prism See minimum deviation of a prism.
primary deviation The deviation found in paralysis of an extraocular muscle when the unaffected eye is fixating.
secondary deviation The deviation found in paralysis of an extraocular muscle when the eye with the paralytic muscle is fixating.
skew deviation A form of strabismus, typically vertical, that does not follow any standard or typical pattern and is usually difficult to quantify. It may be due to a midbrain disorder, multiple sclerosis or myasthenia gravis.
vertical deviation 
1. Type of ocular deviation found in strabismus in which the deviating eye is rotated upward with respect to the fixating eye.
2. Upward ocular deviation of an occluded eye in the cover test, as found in hyperphoria or hypophoria.
Fig. D2 Hering-Hillebrand deviation H-H (AFPP, apparent frontoparallel plane horopter); V-M (Vieth-Müller circle; X, fixation point)enlarge picture
Fig. D2 Hering-Hillebrand deviation H-H (AFPP, apparent frontoparallel plane horopter); V-M (Vieth-Müller circle; X, fixation point)

de·vi·a·tion

(dē'vē-ā'shŭn)
1. A turning away or aside from the normal point or course.
2. An abnormality.
[L. devio, to turn from the straight path, fr. de, from, + via, way]
References in periodicals archive ?
We will see that ISM comes out more volatile with standard deviation of 23.6 percent compared to SECB with just 8.7 percent.
In the present study we aimed to evaluate the nasal Schirmer test values in patients who had nasal septal deviation. We also compared the results to those of the normal population.
This survey showed that the prevalence of NVC was as common as the prevalence of septal deviation and inferior turbinate hypertrophy in patients with nasal obstruction.
Notwithstanding the above, when testing prepresbyopes, it may be useful to compare the size of the deviation with an accommodative target (appropriate for the patient's age and acuity) and with a spotlight.
Although route deviation has been the most popular type of flexible transit services [4], it has been seldom studied by researchers.
The deviation does not provide a clear explanation of what constitutes an offending agreement; instead it makes the broad statement that DoD cannot contract with an entity that requires employees or contractors of such entity seeking to report fraud, waste or abuse to sign internal confidentiality agreements or statements prohibiting or otherwise restricting such employees or contractors from lawfully reporting such waste, fraud or abuse to a designated investigative or law enforcement representative of a federal department or agency authorized to receive such information.
Frequency and percentage were calculated for gender and correction of caudal deviation. Mean +- SD was calculated for quantitative variables like age.
A short word to create the imagination deviation of the design/process intent.
Infantile esotropia patients with less than 60 prism diopters (PD) deviation who underwent symmetric and asymmetric surgery and were followed for at least six months postoperatively were included in the study.
Mean deviation for near was statistically higher in group 2 and 3.
Nasal septal deviation was found in 49(81.7%) subjects; 11(18.3%) had it in both right and left sides, 16(26.7%) in right alone and 22(36.7%) in the left side.