منابع مشابه
Cilio-retinal arterial circulation in central retinal vein occlusion.
The hypothesis that an occlusion of the central retinal artery is an essential prerequisite for haemorrhage formation after central retinal vein obstruction has been investigated by examining the fundus changes in patients with a cilio-retinal arterial circulation; the findings are at variance with the 'combined occlusion hypothesis'. Comparisons were made between the pathological features in t...
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Noncontact retinal blood flow measurements are performed with a Fourier domain optical coherence tomography (OCT) system using a circumpapillary double circular scan (CDCS) that scans around the optic nerve head at 3.40 mm and 3.75 mm diameters. The double concentric circles are performed 6 times consecutively over 2 sec. The CDCS scan is saved with Doppler shift information from which flow can...
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The authors emphasize the need for the development of non-invasive objective methods for the study of retinal circulation under physiologic or pathologic conditions. Clinical methods embrace the use of blue field entoptic phenomenon (that estimates leucocy tes circulating in the peri-foveal capillary bed), Laser-Doppler speedometer (that allows the mea surement of erythrocyte.velocity in retina...
متن کاملAcute effect of metipranolol on the retinal circulation.
AIM To assess the effect of topical and systemic application of a beta adrenergic receptor blocker on retinal haemodynamics. METHODS 24 healthy subjects were included in this double masked, randomised, placebo controlled crossover study. Metipranolol, a non-selective beta adrenergic receptor blocking agent was used as test drug. In all subjects arm-retina time, arteriovenous passage time, art...
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The effect of topical timolol maleate 0.5% on the retinal circulation was investigated in 14 normal subjects using laser Doppler velocimetry and monochromatic fundus photography. In a double masked, randomized design, one eye received two drops of timolol maleate 0.5% and the fellow eye received two drops of placebo. Vessel diameter, maximum velocity of red blood cells, and volumetric blood flo...
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ژورنال
عنوان ژورنال: Nature
سال: 1896
ISSN: 0028-0836,1476-4687
DOI: 10.1038/053558a0