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Background: The Pola Test measures associated phoria at distance and near using a variety of different targets. This testing method and interpretation is referred to as the MKH-Haase method. The aim of this study is to compare the associated phoria values measured using the MKH-Haase chart results with other associated phoria tests.
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... This is part of the Mess-und Korrektionsmethodik nach H.-J. Haase (MKH-Haase system), (See Figure 2) used extensively in German speaking countries, and its comparison to other common clinical tests has been reviewed in detail by researchers at the University of Waterloo. 8 METHODOLOGY My approach to prescribing low amounts of prism is a hybrid of the Mallet and Haase determination of an associated phoria, blended with data from the Maddox Rod measurement of a dissociated phoria in free space. The determination of an uncompensated phoria is conducted after a conventional refraction to determine the best spectacle lens Rx (related to visual acuity) and involves retinal slip in Panum's area. ...
... These results are described in previous publications. 11,12 All tests were administered by one person (the first author). History, including the questionnaire, was taken first. ...
Background: H.J. Haase developed a set of tests for measuring associated phoria and
stereopsis using a variety of different targets for each. This study investigates the test-retest repeatability of the distance and near stereopsis tests for the MKH-Haase charts.
Methods: MKH-Haase contour (Line Test) and randomdot (Steps Test) stereopsis
tests were measured at distance and near for 34 symptomatic and 40 asymptomatic
participants on two different sessions. The MKH-Haase protocol requires the stereoacuity
to be measured twice within a session; once for crossed and once for uncrossed disparities.
Results: Direct comparison within sessions did not reveal any significant differences in MKHHaase stereoacuity tests between symptomatic
and asymptomatic groups; hence, the two groups were pooled for further analysis. The
within and between-sessions repeatability of most MKH-Haase stereoacuity tests results
was good at both distance and near. However, there were a few exceptions to this general
finding. Crossed disparity thresholds were significantly lower than uncrossed disparities
within the first session at distance for both Line and Steps tests. The differences between
sessions for both disparities were not significant for all stereoacuity tests except the
Steps test at distance.
Conclusions: MKH-Haase stereoacuity charts are considered reliable tests for measuring
local and global stereothreshold at both distance and near.