David Thor Bragason

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BACKGROUND Structural and physiological abnormalities have been reported in the retina in Alzheimer's disease (AD). Retinal oximetry detects changes in retinal oxygen metabolism in many eye diseases, where structural changes are seen. OBJECTIVE To compare oxygen saturation in retinal blood vessels in patients with AD and a healthy cohort. METHODS Oxygen(More)
PURPOSE To assess retinal vessel oxygen saturation and retinal vessel diameter in retinitis pigmentosa. METHODS A retinal oximeter (Oxymap ehf., Reykjavik, Iceland) was used to measure retinal vessel oxygen saturation and vessel diameter in ten patients with retinitis pigmentosa (RP) (mean age 49 years, range 23-71 years). Results were compared with age-(More)
To estimate the presence and variability of retinal hypoxia in patients with central retinal vein occlusion (CRVO). Hemoglobin oxygen saturation was measured in retinal vessels of both eyes in 14 patients with unilateral CRVO. The noninvasive spectrophotometric retinal oximeter is based on a fundus camera and simultaneously captures two images at 570 nm and(More)
Dear editor; We want to thank Yolcu et al. for their insightful letter about our study. We fully agree with their opinion on pertinence for oximetric results of central retinal vein occlusion (CRVO) eyes with and without macular edema or retinal ischemia to be compared with each other. We also agree that its results can be compared with fluorescein(More)
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 circulation. The purpose of this study was to test the capability of the Oxymap T1 oximeter to detect(More)
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