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Definition: DUCTION

Part of Speech Definition
Noun 1. Guidance.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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"Duction" is a common misspelling or typo for: suction, diction, eduction, ruction.

Date "Duction" was first used in popular English literature: sometime before 1914. (references)

Etymology:Duction \Duc"tion\, noun. [Latin expression ductio, from ducere to lead.]. (references)


Extended Definition: DUCTION

Duction

A duction is an eye movement involving only one eye[1]. There are generally six possible movements depending upon the eye's axis of rotation:

  1. Abduction refers to the outward movement of an eye.
  2. Adduction refers to the inward movement of an eye
  3. Supraduction / sursumduction / elevation
  4. Infraduction / deorsumduction / depression
  5. Incycloduction / intorsion
  6. Excycloduction / extorsion


Forced duction test

The forced duction test is performed in order to determine whether the absence of movement of the eye is due to a neurological disorder or a mechanical restriction[2].

The anesthetized extraocular muscle is grasped with forceps and an attempt is made to move the eye ball in the direction where the movement is restricted. If a mechanical restriction is present, it will not be possible to induce a passive rotation of the eye ball[3].

This test is invasive.


Notes

  1. Kanski, JJ. Clinical Ophthalmology: A Systematic Approach. Boston:Butterworth-Heinemann;1989.
  2. Forced duction - definition from Biology-Online.org
  3. Kunimoto D, Kanitkar K & Makar M. The Wills Eye Manual. Office and Emergency Room Diagnosis and Treatment of Eye Disease. Fourth Edition. Lippincott Williams & Wilkins; 2004

See also

  • Extraocular muscles
  • Eye examination
  • Vergence
  • Version (eye)


Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Duction". Image Credit.
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Topics by Level of Interest: DUCTION

Topics sorted by level of Interest Level (1=low, 600=high)     Topics sorted Alphabetically Level (1=low, 600=high)
Duction 4     Duction 4

Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).

"duction" is a common misspelling or typo for: suction, diction, eduction, ruction.

Synonyms: duction
Position Synonyms (sorted by strength)

Noun

 guidance.
Consider also: conduct, direction, government, control, advice, administration, counsel, management, charge, guide, instruction, recommendation, regulation, advocate, care, commission, counseling, counsellor, counselor, way.
Source: Eve, based on meta analysis. Top

Translations: DUCTION

Language Translations (or nearest inflections or synonyms, in parentheses)
Japanese 導管イオン (duction). Additional references: Japanese, Japan, Taiwan, duction. (volunteer & more translations)
Source: Eve, based on a combination of meta analysis and graph theory (for near and back translations). Top