Results 291 to 300 of about 130,020 (331)
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Retinal Vessels in Down's Syndrome
Archives of Ophthalmology, 1973The fundus vessels of 50 institutionalized mongols were compared with the fundus vessels of 50 sex-matched controls of similar age. Mongols appear to have significantly more retinal vessels crossing the margin of the optic nerve head. The high number of vessels is associated with an unusual, spoke-like appearance of the retinal vasculature and may be ...
Bluma Tischler +2 more
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Acta Ophthalmologica, 2012
AbstractPurpose In the recent years much interest was directed towards the analysis of retinal vessel diameters. This is related to our improved understanding of the systemic, ocular, environmental and genetic factors that control retinal vascular calibers.Methods Methods to assess retinal vessel diameters are described. In addition, more sophisticated
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AbstractPurpose In the recent years much interest was directed towards the analysis of retinal vessel diameters. This is related to our improved understanding of the systemic, ocular, environmental and genetic factors that control retinal vascular calibers.Methods Methods to assess retinal vessel diameters are described. In addition, more sophisticated
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Ultrastructure of retinal vessel in retinoblastoma
Experientia, 1970Les vaisseaux de la retine humaine dans la retinoblastoma contiennent les cellules endotheliales, les pericytes, et les membranes de la base. Quelques villosites poussent a la surface endotheliale vers le vaisseau du lumen. Les barres terminales se trouvent pres de la jonction endotheliale.
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Objective Measurements of the Retinal Vessels
Annals of Internal Medicine, 1967Excerpt One of the many arts that together make up the "art of medicine" is the ability to base hard decisions on soft data.
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Retinal vessel oxygen saturation and vessel diameter in retinitis pigmentosa at various ages
Graefe's Archive for Clinical and Experimental Ophthalmology, 2015This study was conducted to determine whether oxygen saturation and retinal blood vessel diameter are affected by retinitis pigmentosa (RP) at various ages.Relative oxygen saturation was measured in retinal blood vessels in 68 RP patients and 136 normal subjects using the Oxymap T1 retinal oximeter.
Leilei Lin +8 more
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The ultrastructure of the retinal blood vessels
Journal of Ultrastructure Research, 1963The large veins and arteries in the normal human, monkey, and rat retina have been studied by electron microscopy. Vessels in the four retinal quadrants extending from the optic disc to the periphery were studied. The arterial system is especially endowed with smooth muscle.
Lynette Feeney, Michael J. Hogan
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The entoptic view of the retinal vessels
Acta Ophthalmologica, 2013Abstract.The first time the retinal vessels were seen in man in vivo was reported in 1819 by Purkinje as an entoptic view. This was understood to show the shadow of the vessels, an interpretation objected to in 1834 by Brewster. Müller in 1855 (Über die entoptische wahrnehmung der netzhautgefässe, insbesondere als beweismittel für die lichtperception ...
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The visibility of retinal blood vessels
Vision Research, 1975Abstract The plexus of retinal blood vessels was made visible by moving the shadow across the retina in a controlled manner. Frequency of scanning, amplitude of shadow movement, illuminance, contrast and other parameters were varied while flicker was minimised. Reciprocity between diameter and frequency of scanning (to give a constant speed of shadow
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Congenital retinal vessel tortuosity
Clinical and Experimental Optometry, 2021Sameeksha Agrawal +2 more
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