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Possibility about evaluation test of Substitution of NPC Alteration for AC/A Ratio

폭주근점 변화의 AC/A비 대체 평가지표에 대한 가능성

  • Yoo, Hyun (Dept. of Health Science, Graduate School of Health Science, Far East University) ;
  • Lee, Eun-Hee (Dept. of Health Science, Graduate School of Health Science, Far East University)
  • 유현 (극동대학교 보건과학대학원 보건과학과) ;
  • 이은희 (극동대학교 보건과학대학원 보건과학과)
  • Received : 2016.08.24
  • Accepted : 2016.10.20
  • Published : 2016.10.28

Abstract

This study aimed to evaluate the possibility for assessment of binocular visual function about alteration for near point of convergence (NPC). Study subjects were total 30 (emmetropia 16, myopia 14), who had no eye disease except for the phoria and monocular corrected vision 1.0 and over. Near point of accommodation (NPA), NPC and phoria test were measured both at ordinary and stimulation of +1D. Ordinary NPC was 1.77cm shorter than NPC stimulated +1D and the NPC of emmetropia was shorter than that of myopia. The difference between NPC stimulated +1D and ordinary were increased in the emmetropia. As the NPC increased, the AC/A ratio was elevated and the feature of near exophoria appeared. The results suggested that the alteration of NPC might substitute AC/A ratio for reference variable of binocular vision. If converged and analyzed comparatively with another binocular visual evaluation test, the alteration of NPC could be developed for substitution of evaluation test.

Keywords

Near point of convergence (NPC);Near point of accommodation (NPA);binocular vision;AC/A ratio;Convergence

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