Medical term:
intorsion
intorsion
[in-tor´shun]tilting of the upper part of the vertical meridian of the eye toward the midline of the face.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
in·tor·sion
(in-tōr'shŭn),Conjugate rotation of the upper poles of each cornea inward.
[L. in-torqueo, pp. tortus, to twist]
Farlex Partner Medical Dictionary © Farlex 2012
in·tor·sion
(in-tōr'shŭn)Conjugate rotation of the upper poles of each cornea inward.
[L. in-torqueo, pp. tortus, to twist]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
torsion
Rotation of an eye about an anteroposterior axis. If the upper pole of the vertical meridian of the cornea appears to rotate inward, it is called intorsion, and outward, extorsion. If the eye rotates to the right it may be called dextrotorsion and if it rotates to the left it may be called laevotorsion. It may occur as a result of a head tilt, extraocular muscle weakness or rotation of the eye to a tertiary position. Syn. cycloductin; cyclorotation; torsional movement. See Donder's law; tertiary position; incongruous hemianopia.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
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