positive accommodation


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Related to positive accommodation: accommodative facility

accommodation

 [ah-kom″ah-da´shun]
adjustment, especially adjustment of the eye for seeing objects at various distances. This is accomplished by the ciliary muscle, which controls the lens of the eye, allowing it to flatten or thicken as is needed for distant or near vision.
Flattening and rounding of lens during accommodation.
absolute accommodation the accommodation of either eye separately.
amplitude of accommodation range of accommodation.
histologic accommodation changes in morphology and function of cells following changed conditions.
negative accommodation adjustment of the eye for long distances by relaxation of the ciliary muscle.
positive accommodation adjustment of the eye for short distances by contraction of the ciliary muscle.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pos·i·tive ac·com·mo·da·tion

increased refractivity of the eye that occurs when shifting from the distance to a near object.
Farlex Partner Medical Dictionary © Farlex 2012

pos·i·tive ac·com·mo·da·tion

(poz'i-tiv ă-kom'ŏ-dā'shŭn)
Increased refractivity of the eye that occurs when shifting focus from the distance to a near object.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

positive accommodation

Contraction of the ciliary muscle to adjust for near vision.
See also: accommodation
Medical Dictionary, © 2009 Farlex and Partners