Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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Relationship Between Vergence Facility and Fusional Vergence

버전스용이와 융합버전스의 관계

  • Received : 2009.07.21
  • Accepted : 2009.09.08
  • Published : 2009.09.30
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Abstract

Purpose: There is uncertainty if the vergence facility would provide clinically significant supplementary information to the fusional vergence measurements. The purpose of this study was to determine the relationship between vergence facility and fusional vergence in a group of symptomatic subjects. Methods: A total of 114 symptomatic subjects aged 9 to 13 years, who passed the vision screening test, participated in this study. Vergence facility was measured with 8$\Delta$ BI/8$\Delta$ BO flipper lenses and a suppression control target, the 20/30 letter line on Vectogram 9 (Bernell, USA). Near fusional vergence was measured with a single 20/30 vertical line target by Von Graefe technique. In order to avoid excessive convergence stimulation, negative fusional vergence (NFV) range (blur, break and recovery) was measured followed by positive fusional vergence (PFV) ranges (blur, break and recovery). Results: Pearson correlations were calculated and showed no correlations between vergence facility and any of fusional vergence measurements (p>0.05). Also, there were no significant differences of vergence facility measurements on the compensating vergence that passed or failed Sheard and Morgan's criterion for comfortable vision (p>0.05). Conclusions: There was no correlation between vergence facility and fusional vergence among symptomatic subjects. Hence, both vergence facility and fusional vergence should be assessed for those with binocular dysfunction in order to make an accurate diagnosis and management plan.

목적: 버전스용이가 융합버전스에 대해 임상적으로 의미 있는 추가정보를 제공하는지에 대해 명확하지 않다. 이 연구에서는 눈증상이 있는 집단을 대상으로 버전스용이와 융합버전스의 관계를 확인해보고자 한다. 방법: 선별검사 를 실시하여 선정된 눈증상이 있는 9세에서 13세 사이의 남여 114명을 대상으로 하였다. 버전스용이 검사는 8$\Delta$ BI/8$\Delta$ BO 플리퍼 렌즈와 단안 억제방지를 위해 Vectogram 9(Bernell, USA)의 20/30 시표를 사용하여 측정하였다. 근거리의 융합버전스는 20/30 수직단일시표를 사용하여 Von Graefe 기법을 이용하였고, 과다한 눈모임자극을 방지하기 위하여 음성 융합버전스 범위(흐린점, 분리점, 회복점)를 측정한 후 양성 융합버전스 범위(흐린점, 분리점, 회복점)를 측정 하였다. 결과: 버전스용이와 융합버전스의 다양한 측정값에 대해 실시한 Pearson 상관성 분석에서 버전스용이와 융합버전스의 어느 값과도 관련성이 없는 것으로 나타났다(p>0.05). 그리고 편안한 양안시를 위해 Sheard와 Morgan의 융합력 평가기준을 만족하는 경우와 만족하지 못하는 경우에 대한 버전스용이를 비교한 결과에서도 유의한 차이를 보이지 않았다(p>0.05). 결론: 증상이 있는 집단을 대상으로 한 버전스용이와 융합버전스는 관련성이 없음을 확인하였다. 따라서 양안시이상을 정확하게 진단하고 효율적인 관리계획을 수립하는데 도움을 주기위하여 버전스용이와 융합버전스를 모두 측정해야 할 것이다.

Keywords

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