雙眼視覺之斜位測量方法差異性研究

Comparing Heterophoria with Three Measuring Methodologies

10.30096/CSMJ.201009.0005

蔡龍輝(Lung-Fei Chai)；林培正(Jimmy Su)；蘇國禎(David P C Lin)；陳賢堂(Shyan-Tarng Chen)

雙眼視覺 ； 雙眼視異常 ； 斜位 ； 非補償性 ； 融像 ； AC/A比 ； 視網膜對應點 ； Binocular Vision ； Binocular Vision Anomalies ； Heterophoria ； Decompensation ； Fusion ； Accommodative Convergence/Accommodation Ratio ； Corresponding Retinal Points

中山醫學雜誌

21卷3期（2010 / 09 / 01）

275 - 284

繁體中文

Purpose: To perform a differential analysis among clinical measurement methodologies for heterophoria and their applications under various environments. Methods: Von Graefe Technique (VG) and Maddox Rod (MR) were used to measure vertical and horizontal heterophoria at a 6-meter far sight. Von Graefe Technique (VG), Maddox Rod (MR) and Modified Thorington (MT) were used to measure vertical and horizontal at a 0.4-meter near sight. We differentially analyzed the far sight and near sight results. Results: T-test values in the far sight horizontal and vertical phorias for VG and MR methods were 0.43 (p=0.67) and 1.04 (p=0.30) respectively. Since the P values for both horizontal and vertical heterophoria measurements were larger than 0.05, no significant difference was found between VG and MR for far sight heterophoria measurements. Using ANOVA to compare VG, MG, and MT results, near sight vertical phorias and the near sight horizontal phorias had F values 0.22 (p=0.80) and 0.74 (p=0.48). The P values for both horizontal and vertical heterophoria measurements were also larger than 0.05. Thus, there was no significant difference among VG, MR, and MT methods for near sight heterophoria measurements. Conclusion: Because VG method requires persistent focus on a clear target as well as many more skills and better instruction to the patients. The MT and MR methods are more convenient than VG method and convey better reproducibility when the measurements are performed in a free space. Since there was no significant difference between the VG and MR methods for far sight heterophoria measurement and none among VG, MR and MT methods for near sight heterophorias, the MR method can be considered for measurements in a free space environment.

Purpose: To perform a differential analysis among clinical measurement methodologies for heterophoria and their applications under various environments. Methods: Von Graefe Technique (VG) and Maddox Rod (MR) were used to measure vertical and horizontal heterophoria at a 6-meter far sight. Von Graefe Technique (VG), Maddox Rod (MR) and Modified Thorington (MT) were used to measure vertical and horizontal at a 0.4-meter near sight. We differentially analyzed the far sight and near sight results. Results: T-test values in the far sight horizontal and vertical phorias for VG and MR methods were 0.43 (p=0.67) and 1.04 (p=0.30) respectively. Since the P values for both horizontal and vertical heterophoria measurements were larger than 0.05, no significant difference was found between VG and MR for far sight heterophoria measurements. Using ANOVA to compare VG, MG, and MT results, near sight vertical phorias and the near sight horizontal phorias had F values 0.22 (p=0.80) and 0.74 (p=0.48). The P values for both horizontal and vertical heterophoria measurements were also larger than 0.05. Thus, there was no significant difference among VG, MR, and MT methods for near sight heterophoria measurements. Conclusion: Because VG method requires persistent focus on a clear target as well as many more skills and better instruction to the patients. The MT and MR methods are more convenient than VG method and convey better reproducibility when the measurements are performed in a free space. Since there was no significant difference between the VG and MR methods for far sight heterophoria measurement and none among VG, MR and MT methods for near sight heterophorias, the MR method can be considered for measurements in a free space environment.