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Page 1 from 329 results
Iris transluminance in type 2 diabetes.
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OBJECTIVE
Cross-sectional analysis of iris transluminance in type 2 diabetic patients compared with control subjects, all followed in a cohort study.
METHODS
A cohort consisting of a well-characterized group of 82 type 2 diabetic patients were followed for 10 years after diagnosis, as were 125
Anterior-chamber hypoxia and iris vasculopathy in pseudoexfoliation syndrome.
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Iris vasculopathy is a well-recognized clinical feature in pseudoexfoliation syndrome (PES). In the present study we examined the morphology of the iris vasculature in PES using electron microscopy and we tested whether these iris vascular changes were correlated with an impaired oxygen supply to
Iris neovascularisation in eyes with pseudoexfoliation syndrome.
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The iris vascular bed of eyes with pseudoexfoliation syndrome has been studied with electron microscopy. Two of the eyes suffered from painful glaucoma, whereas the third showed normal intraocular pressure. The following changes were observed: (1) deposits of pseudoexfoliation material lying
Central retinal vein occlusion and iris neovascularization hemorrhage.
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Although there have been few direct observations, the etiology of spontaneous hyphema in patients with retinal or ocular hypoxia is assumed to be hemorrhage from a neovascular iris vessel. This paper reports observed hemorrhage from such a rubeotic iris in a patient with central retinal vein
A histopathologic study of iris changes in pseudoexfoliation syndrome.
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OBJECTIVE
To investigate the histopathologic causes for the most prominent clinical observations of the iris of patients with pseudoexfoliation syndrome (PXS), particularly poor mydriasis but also atrophy of the iris pigment epithelium with anterior chamber melanin dispersion, stromal atrophy, and
Aerobic metabolism on muscle contraction in porcine iris sphincter.
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Eyes are supplied O2 through the cornea and vessels of the retina and iris, which are tissues characterized by aerobic metabolism. Meanwhile, there are no reports on the association between iris sphincter contraction and aerobic metabolism. In this paper, we studied the aforementioned association.
A novel in vivo model of puncture-induced iris neovascularization.
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OBJECTIVE
To assess iris neovascularization by uveal puncture of the mouse eye and determine the role of angiogenic factors during iris neovascularization.
METHODS
Uveal punctures were performed on BalbC mouse eyes to induce iris angiogenesis. VEGF-blockage was used as an anti-angiogenic treatment,
Iris arteriolar diameters in hypoxia and hyperoxia: a photographic study in albino guinea pigs.
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The irides of albino guinea pigs were photographed, and the iris arteriolar diameters were measured with the animal breathing room air, 10% O2/90% N2, or 100% O2. The iris arterioles constrict significantly in hyperoxia and dilate in hypoxia. The average constriction in 100% O2 was 27% +/- 8%, and
Long-term anoxia tolerance in leaves of Acorus calamus L. and Iris pseudacorus L.
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Mature green leaves of Acorus calamus and Iris pseudacorus have been shown to survive at least 28 d of total anoxia in the dark during the growing season, increasing up to 75 d and 60 d in overwintering leaves in A. calamus and I. pseudacorus, respectively. During the period of anaerobic incubation
Noradrenalin content and ultrastructure of adrenergic nerves of rabbit iris after sympathectomy and hypoxia.
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Iris rubeosis, severe respiratory failure and retinopathy of prematurity--case report.
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OBJECTIVE
Case study reports for the first time about development of massive iris neovascular complication in course of retinopathy of prematurity related to systemic and ocular ischemic syndrome due to tracheostomy-requiring extremely severe premature respiratory failure.
METHODS
Premature female,
[The significance of ciliary circulation in the development of iris neovascularisation (author's transl)].
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Three cases of peripapillary choroidal filling defects demonstrated by fluorescein angiography are presented. In two cases the defect was interpreted as an occlusion of a posterior ciliary artery. One of these patients had neovascularization of the iris and ischemia of the upper half of the retina.
Longitudinal tumor hypoxia imaging with [(18)F]FAZA-PET provides early prediction of nanoliposomal irinotecan (nal-IRI) treatment activity.
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BACKGROUND
Non-invasive measurement of tumor hypoxia has demonstrated potential for the evaluation of disease progression, as well as prediction and assessment of treatment outcome. [(18)F]fluoroazomycin arabinoside (FAZA) positron emission tomography (PET) has been identified as a robust method for
Bilateral iris neovascularization as the initial sign of obesity-hypoventilation (Pickwickian) syndrome: hypoxia/hypercapnia as a stimulus for angiogenesis.
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The archaeogastropod mollusc Haliotis iris: tissue and blood metabolites and allosteric regulation of haemocyanin function.
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We investigated divalent cation and anaerobic end-product concentrations and the interactive effects of these substances and pH on haemocyanin oxygen-binding (Hc-O(2)) in the New Zealand abalone Haliotis iris. During 24 h of environmental hypoxia (emersion), D-lactate and tauropine accumulated in
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