Accommodation is the adjustment of the eye for various distances whereby it is able to focus the image of an object on the retina by changing the curvature of the lens.

Paralysis of accommodation is the inability of the eye to adjust itself to various distances owing to loss of motion or function of ciliary muscles.

Paralysis of accommodation may be caused by mydriatic eye drops; narcotics; or some dysfunction of the third, fourth or sixth cranial nerve. Acute pupil dilation may occur when there is damage to the ciliary ganglion in the orbit. Possible causes for this may be infection (influenza), trauma (blunt) or ischemia (temporal arteritis).

Paralysis of accommodation may result in loss of visual acuity, blurred vision, loss of vision, lack of pupil response, and photophobia.

Tests may include: visual acuity; visual fields; pupillary light reflex; ophthalmoscopy; visual evoked response (VER); computed tomography (CT) scan; magnetic resonance imaging (MRI); and PERRLA (pupils equal, round, reactive to light and accommodation) examination.

Any underlying disorder that may be causing Paralysis of accommodation will need treatment. Drugs that are being used for therapy to dilate the pupil or maintain paralysis of accommodation may need to continue.

Any disease or medication that affects the ciliary muscles may cause Paralysis of accommodation. These circumstances can contribute to paralysis of accommodation because the function of the ciliary muscles is to contract and relax zonular fibers and change the tension on the capsule of the lens.

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