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Browsing by Author "Stefánsson, Einar"

Browsing by Author "Stefánsson, Einar"

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  • Karlsson, Róbert Arnar; Ólafsdottir, Ólöf Birna; Helgadóttir, Védis; Belhadj, Soumaya; Elíasdóttir, Þórunn Scheving; Stefánsson, Einar; Harðarson, Sveinn Hákon (2021-12)
    Purpose Retinal oximetry is a technique based on spectrophotometry where images are analyzed with software capable of calculating vessel oxygen saturation and vessel diameter. In this study, the effect of automation of measurements of retinal vessel ...
  • Kallab, Martin; Schuetzenberger, Kornelia; Hommer, Nikolaus; Schäfer, Bhavapriya Jasmin; Schmidl, Doreen; Bergmeister, Helga; Zeitlinger, Markus; Tan, Aimin; Jansook, Phatsawee; Loftsson, Þorsteinn; Stefánsson, Einar; Garhöfer, Gerhard (2021-05-18)
    The purpose of this study was to evaluate the ocular pharmacokinetics, bio-distribution and local tolerability of γ-cyclodextrin (γCD) based irbesartan 1.5% eye drops and candesartan 0.15% eye drops after single and multiple topical administration in ...
  • Johannesson, Gauti; Gottfredsdottir, Maria; Ásgrimsdóttir, Guðrún Marta; Loftsson, Thorsteinn; Stefánsson, Einar (Wiley, 2020-02-17)
    Purpose: Compare (a) nonmitomycin C (MMC) trabeculectomy and 1.5% dexamethasone nanoparticle (DexNP) eye drops postoperatively with (b) trabeculectomy with MMC and Maxidex® eye drops postoperatively. Methods: Randomized prospective single masked clinical ...
  • Eliasdottir, Thorunn; Bragason, Davíð; Harðarson, Sveinn Hákon; Vacchiano, Charles; Gislason, Thorarinn; Kristjánsdóttir, Jóna Valgerður; Kristjánsdóttir, Gudrún; Stefánsson, Einar (Public Library of Science (PLoS), 2017-03-22)
    Background Determination of the blood oxyhemoglobin saturation in the retinal vessels of the eye can be achieved through spectrophotometric retinal oximetry which provides access to the state of oxyhemoglobin saturation in the central nervous system ...
  • Vehmeijer, Wouter B.; Jonkman, Kelly; Harðarson, Sveinn Hákon; Aarts, Leon; Stefánsson, Einar; Dahan, Albert; Schalij-Delfos, Nicoline E. (2021-03-01)
    Purpose: Retinal oximetry measures oxygen saturation in retinal vessels. With the introduction of a mobile handheld prototype oximeter, this technique will become available for a broader patient population including bedridden patients and newborn babies. ...
  • Vehmeijer, Wouter B.; Magnusdottir, Vigdis; Eliasdottir, Thorunn; Hardarson, Sveinn Hakon; Schalij-Delfos, Nicoline E.; Stefánsson, Einar (Public Library of Science (PLoS), 2016-02-03)
    Dual wavelength retinal oximetry has been developed for adults, but is not available for infants. Retinal oximetry may provide insight into the pathophysiology of oxygen-mediated diseases like retinopathy of prematurity. More insight in the oxygen ...
  • Ólafsdóttir, Ólöf Birna; Sævarsdóttir, Hrafnhildur Sif; Hardarson, Sveinn Hakon; Hannesdóttir, Kristín Hanna; Traustadóttir, Valgerður Dóra; Karlsson, Róbert Arnar; Einarsdóttir, Anna Bryndís; Jónsdóttir, Katrin Diljá; Stefánsson, Einar; Snædal, Jon (Elsevier BV, 2018)
    Introduction We have previously reported that retinal vessel oxygen saturation is increased in mild-to-moderate dementia of Alzheimer's type when compared with healthy individuals. Mild cognitive impairment (MCI) is the predementia stage of the disease. ...
  • Harðarson, Sveinn Hákon; Stefánsson, Einar; Bek, Toke (2021-05-12)
    Purpose According to cross-sectional studies, oxygen saturation is elevated in retinal vessels in diabetic patients. We evaluated how retinal oxygenation (metabolic marker), vessel diameters and retinopathy grade (structural markers) change over time ...