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Title MKH-Haase Charts of Binocular Vision Measurements: Repeatability and Validity of Associated Phoria and Stereotests
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University/Publisher University of Waterloo
Abstract Abstract Introduction: H.J.-Haase developed a systematic set of tests for evaluating binocular vision called the Pola Test. The Pola Test measures associated phoria and stereoacuity at distance and near using a variety of different targets for each. This testing method and interpretation is referred to as MKH-Haase (Measuring and Correcting Methodology after H.J.Haase –the MKH) method. The MKH method is more commonly used in Germany and other European countries than English speaking countries. The MKH-Haase method has been considered a reliable method for prescribing prisms to symptomatic binocular vision patients. Purpose: To investigate the test-retest reliability of binocular vision measurements using the MKH-Haase series of tests that comprise the Pola Test. In addition, I will compare the Pola results with other associated phoria and stereoacuity tests used in North America. Methods: Thirty-four symptomatic and 40 asymptomatic subjects (based on a symptoms questionnaire) participated in this study. Associated phoria and stereoacuity with different tests, including the Pola Test at distance and near, were measured for those subjects on two different sessions. Not all of subjects were tested with all tests. Only 30 subjects in each group completed all of tests. The Pola Test protocol requires the associated phoria and stereoacuity to be measured twice within a session; once with the Polariods oriented with their axes at 45o and 135o and again with the axes switched. Results: Within and between-sessions repeatability of MKH-Haase associated phoria and stereoacuity tests results revealed that most of MKH-Haase associated phoria and stereoacuity tests showed good repeatability within and between-sessions at both distance and near. However, there were a few exceptions to this general finding. Distance horizontal associated phoria values for the Cross Test and Pointer Test at the first session, and the distance Double Pointer Test values at the second session showed some differences between the two views. Between-sessions repeatability of the associated phoria tests did not show any significant differences. For the stereoacuity tests, the differences between the two disparities were statistically significant at the first session for the symptomatic group Line Test and asymptomatic group Step Test. For the second session at distance, the differences were significant with Step Test for both groups. The differences between sessions for both disparities were not significant for most of tests. The symptomatic group’s Step Test for crossed disparity and asymptomatic group's Step Test for uncrossed disparity were exceptions. A repeated measures ANOVA test was conducted to compare different associated phoria tests. Horizontal associated phoria tests without central fusion lock were significantly different from those with central fusion lock at distance and near. Comparison of different stereoacuity tests was conducted by comparing the number of subjects who could identify specific stereothreshold values.…
Subjects/Keywords Pola Test; MKH-Haase Charts; Associated Phoria; Stereoacuity; Fixation Disparity; Stereo Balance Test; Stereo Triangle Test; Ocular Prevalence; Stereo Delay; Binocular Vision
Language en
Country of Publication ca
Record ID handle:10012/8238
Repository waterloo
Date Retrieved
Date Indexed 2020-08-12

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…47 6.1 Within session agreement of the MKH-Haase associated phoria charts .................................... 47 6.1.1 Results…

…47 6.1.2 Discussion ........................................................................................................................... 62 6.2 Between-session repeatability of the MKH-Haase associated phoria charts…

…101 6.5.2 Discussion ......................................................................................................................... 105 6.6 Comparison of MKH-Haase associated phoria charts with other common clinical associated phoria tests…

…34 Figure 17: American Optical Vectographic Associated Phoria Slide at distance................................. 35 Figure 18: Mallett Unit at near…

…36 Figure 19: American Optical Vectographic near point Associated Phoria Test Card .......................... 36 Figure 20: Saladin near point Balance Card ......................................................................................... 37…

…40 Figure 27: Horizontal associated phoria of MKH-Haase Cross Test of the 1st session at distance......50 Figure 28: Horizontal associated phoria of MKH-Haase Pointer Test of the 1st session at distance... 51 Figure 29: Vertical associated phoria of…

…MKH-Haase Rectangle Test of the 1st session at distance .. 52 Figure 30: Vertical associated phoria of MKH-Haase Cross Test of the 1st session at near ............... 55 ix Figure 31: Horizontal associated phoria of MKH-Haase Pointer Test of the 2nd…

…session at distance . 58 Figure 32: Horizontal associated phoria of MKH-Haase Double Pointer Test of the 2nd session at distance…

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