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. 2015 Oct-Dec;5(4):177-181.
doi: 10.1016/j.tjo.2015.07.005. Epub 2015 Sep 16.

Prevalence of general binocular dysfunctions among rural schoolchildren in South Korea

Jung Un Jang  1 , Inn-Jee Park  2
Affiliations

Prevalence of general binocular dysfunctions among rural schoolchildren in South Korea

Jung Un Jang et al. Taiwan J Ophthalmol. 2015 Oct-Dec.

Abstract

Background/purpose: To assess the prevalence of nonstrabismic accommodative and vergence dysfunctions among primary schoolchildren in Hampyeong, a rural area of South Korea.

Methods: Five hundred and eighty-nine primary schoolchildren, 8-13 years old, were each given a thorough eye examination, including binocular-vision testing, near point of convergence, horizontal phoria measurement by von Graefe, and negative and positive vergence amplitudes with prism bar, to determine any form of accommodative or vergence dysfunctions.

Results: Of the 589 participants examined, 168 (28.5%) primary schoolchildren presented some form of nonstrabismic accommodative or vergence dysfunctions. The prevalence of accommodative dysfunctions and vergence dysfunctions was 13.2% and 9%, respectively. Convergence insufficiency (10.3%) was more prevalent than convergence excess (1.9%), and accommodative insufficiency (5.3%) was more prevalent than accommodative excess (1.2%).

Conclusion: This study suggests that nonstrabismic accommodative and vergence dysfunctions are prevalent in the rural area of South Korean primary schoolchildren, and convergence insufficiency was the most prevalent.

Keywords: accommodative dysfunctions; convergence insufficiency; primary schoolchildren; vergence dysfunctions.

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Conflict of interest statement

Conflicts of interest: None of the authors have a conflict of interest about the paper. This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

Figures

Fig. 1
Fig. 1
The correlation of age with vergence dysfunctions.
Fig. 2
Fig. 2
The correlation of age with accommodative dysfunctions.
Fig. 3
Fig. 3
The correlation of vergence dysfunctions with accommodative dysfunctions.
See this image and copyright information in PMC

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