Introduction à l'étude de la fréquence de fusion en clinique.

The description of a new apparatus for clinical research on the frequency of fusion with intermittent light stimuli. The object tested can be placed in any point in the field of vision, whereas the fixation point remains the same. One can, therefore, discover the relationship between the results of the quantitative perimetry and the frequency of fusion. The frequency of fusion was determined through the fixation point and the field of vision up to 30° eccentricity. The diameter of the test object lay between 3° and 7° and was taken empirically, so that the same frequencies could be taken with a normal graph in different parts of the field of vision. Unter these conditions the normal amount of fusion varies between 36 and 46 light impulses per second. Values lower than 36 must be looked upon as pathological and increasingly so the lower they are. © 1946 S. Karger AG, Basel.