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A study on the measurement and tendency of heterophoria using Von Graefe test and Maddox rod test

프리즘 분리법과 마독스 로드 검사법을 이용한 사위측정과 경향 연구

  • 오현진 (백석문화대학교 안경광학과) ;
  • 두하영 (전북과학대학교 안경광학과) ;
  • 오승진 (전북과학대학교 안경광학과)
  • Received : 2012.11.02
  • Accepted : 2012.11.23
  • Published : 2012.12.31

Abstract

To investigate the difference in the value of horizontal heterophoria measured in phoria test of about normal 72 college students, using both Von Graefe test and Maddox rod test. We used two different methods which are Von Graefe test and Maddox rod test on full correction condition at the long distance. Using Von Graefe test of horizontal heterophoria Measurement, We measured 21 patients(29%) for orthophoria, 36 patients(50%) for exophoria and 15 patients(21%) for esophoria at distance. Using Maddox rod test of horizontal heterophoria Measurement, We measured 36 patients(50%) for orthophoria, 26 patients(36%) for exophoria and 10 patients(14%) for esophoria at distance. Each test average were $0.93{\Delta}$ BI for Von Graefe test, $0.96{\Delta}$ BI for Maddox rod test. We could not find the definite difference about the value of horizontal heterophoria aby testing method. Furthermore, heterphoria AC/A ratio was found to vary from 1.0 to 8.8 and its relationship to refractive error could not be determined.

Keywords

Von Graefe test;Maddox rod test;horizontal heterophoria;exophoria