Esotropia with High AC/A Ratio

Updated: Jul 26, 2016
  • Author: Chris Noyes, MD, FAAFP; Chief Editor: Hampton Roy, Sr, MD  more...
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Overview

Background

Strabismus is a misalignment of the eyes such that both eyes are not directed simultaneously at the same object. Esotropia is a type of strabismus characterized by an inward deviation of one eye relative to the other eye. The accommodative convergence/accommodation (AC/A) ratio gives the relationship between the amount of convergence (in-turning of the eyes) that is generated by a given amount of accommodation (focusing effort). Esotropia with high AC/A ratio (also termed nonrefractive accommodative esotropia) combines a high AC/A ratio with low hyperopia or even myopia. Amblyopia (reduced visual acuity due to an abnormal visual experience early in life) frequently develops if the condition remains untreated. [1]

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Epidemiology

Race

No racial predilection exists for esotropia with high AC/A ratio.

Sex

No sex predilection exists for esotropia with high AC/A ratio.

Age

Esotropia with high AC/A ratio presents by the age of 2 years.

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