Retinal diseases such as diabetic retinopathy, glaucoma, vein occlusion and optic nerve atrophy are associated with abnormal oxygen tension and bloodflow in surface vessels of the retina. Visible reflected light spectroscopy has in the past been applied to hemoglobin oxygen saturation measurements from the body surface, as with measurements from skin and wounds, from intact brain vessels during surgical intervention, and as well, from the retinal vessels and other ocular structures inside the body. All of these measurements are complicated by lack of visible light penetration, interference from secondary chromophores, specular return of light and wavelength-dependent penetration to different layers in different structures. We present spectral reflectance curves obtained with a prism-grating-prism (PGP) spectrographic camera from structures producing hemoglobin signatures, including the retinal artery and vein, the pigmented retina and the optic disk, as well as from the macular area which is free of this signature. Oxygen-dependent changes in the hemoglobin signature are determined from vessels and tissue surround.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Spectral reflectance technique for retinal blood oxygen evaluation in humans


    Contributors:
    Beach, J. (author)


    Publication date :

    2002-01-01


    Size :

    1518727 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Spectral Reflectance Technique for Retinal Blood Oxygen Evaluation in Humans

    Beach, J. | British Library Conference Proceedings | 2002


    A Non-Invasive Spectral Reflectance Method for Mapping Blood Oxygen Saturation in Wounds

    Martinez, L. | British Library Conference Proceedings | 2002



    Infrared spectral reflectance of frost.

    Keegan, H. J. / Weidner, V. R. | NTRS | 1966