[The passage of dyes through the retinal vessels]

Examinations of the retinal haemodynamics after injection of fluorescein sodium were performed on three groups of test persons, in normal persons, patients with diseases of the retina as well as patients with organic heart defects. In the group of heart diseases statistically significant disturbances of the retinal haemodynamics could be proved, which the retina tolerates without any lesion. In comparison to this retinopathies with severe changes of the fundus show only slight disturbances of the haemodynamics. These do not give the possibility of the explanation of the changes of the fundus.