[Fixation disparity under various test-conditions (author's transl)].

Measurements of fixation disparity and Panum areas were performed with a special device of the phase-difference haploscope in normal persons. There was a reproduceable influence on fixation disparity and size of Panum areas, when the conditions of examination were changed (position of the binocular fusion-pattern, brightness and contrast of the targets for sensory fusion and time of prism wearing). There found we found only under comparable conditions a quantitative relationship between the two phenomenons.