Sökning: "peripheral aberrations"

Visar resultat 6 - 10 av 32 avhandlingar innehållade orden peripheral aberrations.

  1. 6. Optics for Low Vision Enabling

    Författare :Jörgen Gustafsson; Certec - Rehabiliteringsteknik och Design; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Eccentric viewing; Low vision optics; Low vision rehabilitation; People with low vision; Preferred retinal; locus PRL ; Resolution; Visual acuity; Ophtalmology; Medicinsk teknik; Medical technology; Rehabilitering medicinsk och social ; rehabilitation; revalidation; kinesitherapy; Oftalmologi; Physical medicine; Contrast sensitivity; Detection; Eccentric correction; CFL ; Central visual field loss; Central scotoma; Aberrations; Astigmatism;

    Sammanfattning : For people with central visual field loss, eccentric vision is all that they have to rely on. Even for those who learn how to correctly utilize their eccentric vision, it will never be as good as the central for two entirely different reasons: the off-axis optics of the eye can result in large refractive errors, and the low function of the peripheral retina. LÄS MER

  3. 7. Measurement and evaluation of peripheral wavefront aberrations in the human eye

    Författare :Linda Lundström; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Sammanfattning : .... LÄS MER

  4. 8. Peripheral Optics of the Human Eye:Applied Wavefront Analysis

    Författare :Dmitry Romashchenko; Linda Lundström; Peter Unsbo; Geunyoung Yoon; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optik och fotonik; Optics and Photonics;

    Sammanfattning : I denna avhandling används vågfrontsanalys för att studera ögats perifera optik med betoning på dess betydelse för utvecklingen av närsynthet (myopi). Syftet är att hitta egenskaper i den perifera bildkvalitén som skulle kunna användas av ögat för att reglera dess tillväxt. LÄS MER

  5. 9. Irritable bowel syndrome - a disorder of gut-brain interaction

    Författare :Irina Midenfjord; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Irritable Bowel Syndrome; gastrointestinal symptom severity; anxiety; depression; neurophysiological aberrations; psychological alterations; central sensitization;

    Sammanfattning : Irritable bowel syndrome (IBS) is a common and multifactorial functional gastrointestinal (GI) disorder characterized by altered gut-brain communication. Due to the complexity of gut-brain interactions, the aim of this thesis was to enhance the understanding of associations between GI symptom severity and measures from multiple levels along the gut-brain axis in IBS patients. LÄS MER

  7. 10. Hyperreactive peripheral neutrophils in periodontitis : FCc receptor activation and plasma proteins

    Författare :Margareta Fredriksson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Periodontitis neutrophils; oxygen radicals; smoking; priming.;

    Sammanfattning : It is now well established that adult and juvenile periodontitis are associated with a hyperreactivity of the peripheral neutrophils when measured as increased generation of free oxygen radicals after stimulation of the Fcgamma-receptors. Aim: The aims of these investigations were to study if the increased radical generation was: 1) located intra- or extracellularly and attributed to a specific oxygen species or various activation pathways, 2) connected with "priming" (pre-stimulation only disclosed by a secondary activation), 3) associated with systemic aberrations in plasma parameters induced by the periodontal disease or cigarette smoking or 4) related to the neutrophil production of the cytokines IL-8 and TNFalpha after stimulation. LÄS MER