accommodative insufficiency


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accommodative insufficiency

a lack of appropriate accommodation for near focus.

ac·com·mo·da·tive in·suf·fi·cien·cy

(ă-kom'ŏ-dā-tiv in'sŭ-fish'ĕn-sē)
A lack of appropriate accommodation for near focus.

accommodative insufficiency

Inability to focus the eyes sufficiently to see near objects clearly. Short-sighted people need less than normal accommodation for near; long-sighted people need more. Accommodative power declines almost linearly with age so that about age 45 most people with normal refraction suffer a degree of accommodative insufficiency. Age-related accommodative insufficiency is also known as PRESBYOPIA.

accommodative insufficiency 

Insufficient amplitude of accommodation that is unequivocally below the appropriate level for the age. It may be due to extreme fatigue, influenza, high stress, systemic medication, ocular inflammation, head trauma, thyroid disease or the juvenile form of diabetes mellitus. The condition is often associated with convergence insufficiency, general fatigue, measles, multiple sclerosis, or myotonic dystrophy, etc. It is the most common accommodative dysfunction. Patients complain of blurred vision, or difficulty in sustaining clear vision at near; this is often accompanied by a frontal headache and even sometimes by pain in the eye. A mild form of accommodative insufficiency is often referred to as ill-sustained accommodation (accommodative fatigue) in which the response may be initially normal but cannot be maintained. It is easily discovered with accommodative facility exercises. Ill-sustained accommodation may be a precursor of accommodative insufficiency. Treatment is aimed at the primary cause, but plus lens correction, and in some cases exercises such as accommodative facility training are prescribed. Syn. premature presbyopia. See convergence insufficiency; ocular headache; thyroid ophthalmopathy.
References in periodicals archive ?
In addition, considering that a vision therapy program for accommodative insufficiency can take up to 24 office visits [36], further improvement in lag may occur with more visits.
They are (1) accommodative insufficiency (AI), the most common finding; (2) accommodative excess (AE) or pseudomyopia; and (3) dynamic accommodative infacility.
Some people (even in their 20s) with and without astigmatism simply cannot sustain prolonged accommodation at a near-point task (accommodative insufficiency) without unusual fatigue, even if they enjoy the task.
Accommodative lag, which leads to accommodative insufficiency and pseudo-convergence insufficiency, is the most common binocular vision issue seen in soft contact lens wearers, especially in myopic soft contact lens wearers.
Accommodative insufficiency was diagnosed when the lower limit of the expected value for the patient's age was abnormal according to Hofstetter's formula [18].
Nguyen, "Accommodative insufficiency is the primary source of symptoms in children diagnosed with convergence insufficiency," Optometry and Vision Science, vol.
A common condition experienced by adults and children is accommodative insufficiency where the individual's accommodation is less than expected for someone of their age.
Patients manifesting decreased accommodative amplitude are clinically diagnosed with accommodative insufficiency [6-7].
Accommodative insufficiency and fatigue are characterised by reduced amplitudes of accommodation in relation to the patient's age and signs of fatigue (further reduction of amplitude) on repeated testing.
Patients with ABI might present with accommodative insufficiency, accommodative fatigue, accommodative lag and accommodative infacility.
Indeed, it has been argued that accommodative insufficiency is the primary cause of symptoms in patients with convergence insufficiency.
There are, of course, occasional cases where low plus lenses are indicated, for example cases of decompensated esophoria with a high AC/A ratio, or cases of accommodative insufficiency. (5) Prescribing in these cases however should be supported by the individual clinical results obtained.