Accommodation

accommodation /ac·com·mo·da·tion/ (ah-kom?ah-da´shun) adjustment, especially of the eye for seeing objects at various distances. Symbol A or a.

Changes during accommodation: (A), contraction of ciliary muscles; (B), approximation of ciliary muscles to lens; (C), relaxation of suspensory ligament; (D), increased curvature of anterior surface of lens.

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negative accommodation  adjustment of the eye for long distances by relaxation of the ciliary muscles.

positive accommodation  adjustment of the eye for short distances by contraction of the ciliary muscles.

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ac·com·mo·da·tion (-km-dshn)

n.

1. The act or state of adjustment or adaptation.

2. The automatic adjustment in the focal length of the lens of the eye to permit retinal focus of images of objects at varying distances.

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Accommodation

The ability of the lens to change its focus from distant to near objects. It is achieved through the action of the ciliary muscles that change the shape of the lens.

Mentioned in: Myopia, Presbyopia, Vision Training

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accommodation,

n an impermanent adjustment or adaptation that automatically reverses when whatever is being accommodated is removed.

Accommodation of lens.

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accommodation

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.

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amplitude of accommodation

the total amount of accommodative power of the eye.

histological accommodation

changes in morphology and function of cells following changed conditions.