Do prisms according to Hans-Joachim Haase improve stereoacuity?
Stereoacuity ranged between good and excellent in the 5 subjects with "young" as well as in the 5 subjects with "old fixation disparity". The MKH-prism did not improve the stereoacuity in any of the subjects. These results cast doubt on Haase's assertion that an "old fixation disparity" implies a reduced stereoacuity. Hence, the premise for a benefit of the MKH-prism with respect of stereoacuity is not substantiated. In the 5 subjects with a "young fixation disparity", the good stereoacuity is consistent with Haase's theory, so that a benefit of the MKH-prism for stereoacuity was not expected. In previous studies, stereoacuity was found to be better with the MKH-prism than without it. These studies are questionable since learning with repeated testing was not taken into account. We conclude that there is no sound evidence for the assumption that the MKH-prism can improve stereoacuity.
Our results support the hypothesis of 2 proliferative compartments in the development of ACAD, with differing receptor or enzyme distribution: the compartment of small, intramyocardial arteries in which ACAD can be reduced by ACE or AT(1) blockade, and that of large, epicardial arteries in which inhibition fails.