Learn More
Considerable controversy has arisen as to the nature and origin of the blue-gray flecks seen in the anterior segment of the eye in so-called pseudo-exfoliation of the lens capsule. An electron microscopic study has been carried out in an attempt to clarify this problem and Part I of this work deals with the findings in the lens and lens capsule. The(More)
Of two patients with type 5 hyperlipoproteinemia, one exhibited lipemia retinalis with multiple retinal hemorrhages and intraretinal lipid extravasations. Postmortem examination showed hemorrhages in the inner retinal layers and lipid deposits largely in the outer plexiform layer. Lipid within the walls of the retinal vessels was demonstrated by light and(More)
MAJNO, Palade, and Schoefl (1961), revising an old technique, demonstrated that colloidal carbon injected intravenously was a good indicator of increased vascular permeability and clearly labelled the particular vessels through which plasma protein was escaping. These authors, using this technique of vascular labelling and studying the rat cremaster muscle,(More)
The photoreceptors of dark-adapted skate retinas bathed in a Ringer solution containing horseradish peroxidase (HRP) incorporate the tracer into membrane-bound compartments within the synaptic terminal of the cell; after 1 or 2 h of incubation, approx. 10-38% of the synaptic vesicles were labeled. The receptors appeared to be functioning normally throughout(More)
The initial development of retinal vessels in the rat was studied by light and electron microscopy. In the 15-day-old rat embryo undifferentiated cells derive from the outer wall of the hyaloid vessel, or the immediate surrounding tissue, and migrate into the peripapillary retina beneath the internal limiting membrane. No vascular budding is evident. The(More)