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Accommodation reflex

Definition of the noun accommodation reflex

What does accommodation reflex mean as a name of something?

noun

  1. reflex changes in the eyes that enable an object to be focused on the retina

Explanation

The accommodation reflex is a reflex action of the eye, in response to focusing on a near object, then looking at distant object, comprising coordinated changes in vergence, lens shape and pupil size. It is dependent on cranial nerve II, superior centers and cranial nerve III.The change in the shape of the lens is controlled by the cilliary muscles inside the eye. Changes in contraction of the ciliary muscles alter the focal distance of the eye, causing nearer or farther images to come into focus on the retina; this process is known as accommodation. The reflex, controlled by the parasympathetic nervous system, involves three responses; pupil accommodation, lens accommodation, and convergence.

Printed dictionaries and other books with definitions for Accommodation reflex

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Google previewOculo-refractive Cyclopedia and Dictionary (1921)

by Thomas George Atkinson

In certain nervous diseases, notably locomotor ataxia, the light reflex is abolished while the accommodation reflex remains intact; so that the pupil fails to contract in response to light, but contracts during accommodation. Such a condition is ...

Google previewThe American Encyclopedia and Dictionary of Ophthalmology (1915)

the relaxed accommodation reflex; (4) the sensory reflex, and (5 ) the psychic reflex. Ball has also described very clearly the methods for eliciting each ...

Google previewA Dictionary of Neurological Signs (2016)

by A.J. Larner

A Accommodation Reflex • Secondary: In the context of other cognitive impairments, for example of language (aphasia, alexia or agraphia for numbers), attention, memory, or space perception (e.g. neglect). Acalculia may occur in association ...

Google previewMosby's Dictionary of Medicine, Nursing and Health Professions - Australian & New Zealand Edition (2014)

by Peter Harris, Sue Nagy, Nicholas Vardaxis

See also accommodation reflex. 4. (in sociology) the reciprocal reconciliation of conflicts between individuals or groups concerning habits and customs, usually through a process of compromise, arbitration or negotiation. Also called ...

Google previewMosby's Pocket Dictionary of Medicine, Nursing & Health Professions - E-Book (2013)

by Mosby

accommodation reflex, an adjustment of the eyes for near vision, consisting of pupillary constriction ...

Google previewConcise Medical Dictionary (2015)

by Elizabeth Martin

Although the pupils contract normally for near vision (the accommodation reflex), they fail to contract in bright light. It may occur, for example, as a result of syphilis or diabetes. [D. Argyll Robertson (1837–1909), Scottish ophthalmologist] argyria ...

Google previewMosby's Medical Dictionary (2016)

by Mosby

See also accommodation reflex. 4. (in sociology) the reciprocal reconciliation of conflicts between individuals or groups concerning habits and customs, usually through a process of compromise, arbitration, or negotiation. Also called ...

Google previewMosby's Dictionary of Medicine, Nursing & Health Professions (2016)

by Mosby

See also accommodation reflex. 4. (in sociology) the reciprocal reconciliation of conflicts between individuals or groups concerning habits and customs, usually through a process of compromise, arbitration, or negotiation. Also called ...

Google previewThe Encyclopedia of the Muscle and Skeletal Systems and Disorders (2005)

by Mary Harwell Sayler

For example, flashing a bright light in the eyes causes the pupils to contract in an accommodation reflex that enables the person's vision to adapt while protecting the eyes from glare. A sneeze reflex clears the sinuses, and a cough reflex ...

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