the morphology of retinal photoreceptor layer was studied in continuous light-exposed and dark-adapteddomestic male cats (felis catus). the eyes of 12 healthy adult cats (4 in continuous light-exposed group, 4 in continuous dark-adapted group, and 4 in control group) were routinely fixed and studied by electron microscope. results showed that the general structure of photoreceptor layer in this...

In this Letter we discuss theoretically the instabilities of thermotropic freely standing smectic- A films under shear flow [3]. We show that, in Couette geometry, the centrifugal force pushes the liquid crystal toward the outer boundary and induces smectic layer dilation close to the outer boundary. Under strong shear, this effect induces a layer buckling instability. The critical shear rate i...

Ocular lesions in leptin receptor-deficient medaka were examined histopathologically at 10, 28, and 37 weeks post hatching. Leptin receptor-deficient medaka at 28 and 37 weeks old showed hyperglycemia and hypoinsulinemia. Histopathologically, vacuolation, swelling, fragmentation, and liquefaction of the lens fibers and dilatation of the retinal central veins, retinal capillaries, iridal veins a...

PURPOSE To study the pathophysiology of subfoveal serous retinal detachment (SRD) observed in eyes with extramacular branch retinal vein occlusion (BRVO). METHODS We retrospectively reviewed the medical records of nine patients (nine eyes) with extramacular BRVO with macular complications that were examined using optical coherence tomography (OCT). RESULTS Extramacular BRVO was observed in ...

Abbreviations: MU: Mucosa; BC: Bowman’s Capsule; N: Nucleus; BV: Blood Vessel; OC: Oxyntic Cell; CONL: Choroid Outer Nuclear Layer; CT: Connective Tissue; OPL: Outer Plexiform Layer; CU: Collecting Tubule; PC: Peptic Cell; CV: Central Vein; PE: Peritonial Epithelium; DC: Defected Cell; PP: Pigmented Epithelium; GC: Gland Cell; RAC: Rods and Cones; TGC: Tumour of Gland Cell; SE: Spermiogenesis; ...

Removal of the outer cell wall layers of a gram-negative marine pseudomonad (B-16) showed that these cells are penetrable by actinomycin D and that, therefore, neither the cytoplasmic membrane nor the peptidoglycan layer constitutes the barrier which excludes this antibiotic from intact cells, but that this barrier is formed by the outer layers of the cell wall which include the lipopolysacchar...

The aim of the present study was to determine the distribution of chondroitin sulfate proteoglycans in the mouse retina and optic nerve of the prenatal and postnatal mouse by immunohistochemistry. At embryonic day (E) 18, chondroitin-4-sulfate (C4S), chondroitin-6-sulfate (C6S) and biglycan were detected in the retina and optic nerve. However, aggrecan was seen in the retina but not in the opti...

PURPOSE To investigate the expression and distribution of estrogen receptor protein and mRNA in bovine and rat retinas. METHODS Western blot analysis with an antiestrogen receptor monoclonal antibody (mAb) was used to detect estrogen receptor protein in the bovine retina. Immunohistochemistry with an antiestrogen receptor mAb and in situ hybridization with an oligodeoxynucleotide sequence cod...

OBJECTIVE The aim of this article is to characterize pathomorphologic changes within particular layers of fluorescein angiographically 'ischemic' compared to 'nonischemic' retina in patients with diabetic retinopathy. METHODS Cross-sectional images of ischemic retinal areas were obtained using Heidelberg Spectralis optical coherence tomography (OCT). Presumed retinal ischemia was defined as f...