Zusammenfassung
Raster-elektronenmikroskopische Untersuchung von Methylmethacrylat/Sevriton Ausgüssen
erlaubt räumliche Rekonstruktion von Gefäßen des Auges. Die Arbeit zeigt die Möglichkeit
von Oberflächen-Studien an kleinsten Gefäßen zur Unterscheidung zwischen Venen und
Arterien in der Retina und am N. opticus des Katzenauges.
Summary
Plastic casts of the vasculature of the cat eye were obtained by injecting an acrylic
mixture into the arterial afferent system by an in vivo and an in vitro procedure.
The acrylic mixture traversed the capillary segment of the circulation, filling the
effluent veins. The three-dimensional casts obtained could then be observed in toto
or after dissection, allowing SEM inspection of the ocular vasculature from all sides.
Findings concerning the distribution of veins in the optic nerve revealed an extensive
plexus, particularly developed at the posterior pole and feeding two major efferents
on both sides of the optic nerve. This feature is of interest to physiologists using
the perfused in vitro preparation of the cat eye. Retinal vascular features observed
by this method are likely to be helpful in clarifying certain anatomical substrates
of autoregulatory mechanisms.
