Ultrastructure of retinal vessels in diabetic patients.
نویسندگان
چکیده
منابع مشابه
Ultrastructure of retinal vessels in diabetic patients.
The ultrastructure of retinal vessels was examined in three eyes from diabetic patients and two eyes from control subjects. In some of the retinal blood vessels of each of the diabetic eyes, the endothelial cytoplasm was thin and had fenestrae. These fenestrations which were seen in both capillaries and venules, were closed by a thin diaphragm. Transendothelial channels were also observed in th...
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W e thank Wong et al. (1) for their interest in our study (2) in which we showed that retinal vessels in diabetic patients with increasing stages of diabetic retinopathy experience a continuously decreasing response to flickering light. We believe that the issue raised by Wong et al. is very important. The study by Nguyen et al. (3) showed that arteriolar and venular calibers are structurally l...
متن کاملInfluence of flickering light on the retinal vessels in diabetic patients.
OBJECTIVE Stimulation of the retina with flickering light increases retinal vessel diameters in humans. Nitric oxide is a mediator of the retinal vasodilation to flicker. The reduction of vasodilation is considered an endothelial dysfunction. We investigated the response of retinal vessels to flickering light in diabetic patients in different stages of diabetic retinopathy. RESEARCH DESIGN AN...
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This paper introduces a systematic approach for segmentation of retinal blood vessels towards the diagnosis of proliferative diabetic retinopathy (PDR) from digital fundus images. Here, 2D-Match (Gabor) filters are used on digital fundus images in which the vessels are enhanced by contrast-limited adaptive histogram equalization (CLAHE). A double sided thresholding scheme is then used to segmen...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1993
ISSN: 0007-1161
DOI: 10.1136/bjo.77.9.574