deviation /de·vi·a·tion/ (de″ve-a´shun)
deviation, axis
deviation [de″ve-a´shun]
1. variation from the regular standard or course.
2. strabismus.
3. the difference between a sample value and the mean.
complement deviation inhibition of complement fixation or complement-mediated immune hemolysis in the presence of excess antibody.
conjugate deviation deflection of the eyes in the same direction at the same time.
immune deviation modification of the immune response to an antigen by previous inoculation of the same antigen.
radial deviation
1. a hand deformity sometimes seen in rheumatoid arthritis, in which the fingers are displaced to the radial side.
2. splinting of arthritic hands into this position to correct ulnar deviation.
sexual deviation sexual behavior or fantasy outside that which is morally, biologically, or legally sanctioned, often specifically one of the paraphilias.
standard deviation (SD) a measure of the amount by which each value deviates from the mean; equal to the square root of the variance; symbol σ.
ulnar deviation a hand deformity of chronic rheumatoid arthritis and lupus erythematosus in which swelling of the metacarpophalangeal joints causes displacement of the fingers to the ulnar side.
de·vi·a·tion (d  v-  sh n)n. 1. A turning away or aside from a normal course. 2. An abnormality. 3. Deviant behavior or attitudes. 4. The difference, especially the absolute difference, between one number in a set and the mean of the set. |
deviation, axis
[dē′vē·ā′shən]
Etymology: L, deviare, to turn aside, axle
(in electrocardiography) an abnormal direction of the mean electrical current of the heart.
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.
deviation (dē´vēā´sh
n),n the turning from a regular course; deflection.
deviation
variation from the regular standard or course.
1. In ophthalmology, a tendency for the visual axes of the eye to fall out of alignment owing to muscular imbalance.
2. in statistics the difference between the predicted value of a variable and the actual value.
standard deviation
a measure of statistical dispersion. See standard 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
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)
deviation
Vox populi A departure from a norm. See Septal deviation, Standard deviation.
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