Ultrastructural studies in the retinal and choroidal microcirculation of the mammalian eye.
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Ultrastructural studies in the retinal and choroidal microcirculation of the mammalian eye.

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Published .
Written in English


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Edition Notes

Thesis (M.Sc.)--The Queen"s University of Belfast, 1983.

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Pagination1 v
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Open LibraryOL21447240M

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  To investigate the retinal and choroidal microvasculature in patients with systemic sclerosis (SSc) who have no clinical evidence of retinopathy and to compare these structures with those of Cited by: 2.   N-methyl-N-nitrosourea (MNU) is known to cause apoptosis of photoreceptor cells and changes in retinal pigment epithelium (RPE). However, the changes in choriocapillaris, which nourishes photoreceptor cells by diffusing tissue fluid through RPE, have not been reported in detail. Therefore, we studied the ultrastructural transformation in and around the choriocapillaris to characterize the Cited by: 1. The Queen's University of Belfast, Eye and Ear Clinic, Royal Victoria Hospital, Belfast BTBA,NorthernIreland. for direct comparison of a 'barrier' circulation (retinal) with a highly permeable visceral type of circulation (choroidal) underidentical experimental conditions. The fate of horseradish peroxidase was studied in the retinal and Cited by: The endocytosis of horseradish peroxidase (HRP) by the vascular cells of retinal and choroidal blood vessels was compared in immersion and perfusion fixed eyes from individual rats. The mechanisms of endocytosis of HRP appeared identical in both retinal and choroidal vessels. The bulk of internalised tracer occurred in macropinosomes nm in diameter.

The retina receives its nutrients from two separate circulations: retinal and choroidal circulation. This short overview describes the determinants in the regulation of these circulations.   Most studies indicate that the effects of either topical or systemic β-receptor antagonists on choroidal and retinal blood flows are small,,,,. When investigating the effect of topical antiglaucoma drugs on ocular perfusion one needs, however, to consider that a decrease in IOP leads to an increase in the perfusion pressure.   Autoregulation in the retina could maintain continuous and sufficient blood flow to ensure the function of the retinal tissue despite the change of local factors, such as metabolic factors and CO , 53 Unlike the outer retina, which primarily gets nutrients from the choroidal blood flow, the inner retina is primarily supplied by the retinal.   Chapter - Retinal and Choroidal Circulation SHIYOUNG ROH JOHN J. WEITER INTRODUCTION The normal clarity of the ocular media allows the retinal circulatory system to be observed in vivo. Because many of the important diseases of the retina are related to or associated with changes in the vasculature of the retina and.

  The relationship between choroidal and retinal microvascular changes has not yet been well described, and there were limited data on diagnostic ability of optical coherence tomography (OCT. Figure 1 A cutaway drawing of the human eye showing the major blood vessels supplying the retina choroid and anterior segment. The view is from a superior position over the left eye and the horizontal section passes through both the optic nerve and the fovea. Drawing by Dave Schumick. 10 Developmental Anatomy of the Retinal and Choroidal.   The purpose of this study was to assess the macular retinal and choroidal thickness changes in OSAS patients with no significant symptoms and pathological changes in .   Imaging of retinal and choroidal vascular tumours. (45°) and ultra wide-angle (°) digital images in the macula in the Reykjavik eye study. Eye ; 24 (10): –