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  • glare  (3)
  • Leberversagen
  • 1
    ISSN: 1573-2622
    Keywords: Diaphany ; translucency ; straylight ; glare ; light scatter ; X-linked megalocornea ; contrast sensitivity ; visual optics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Intraocular straylight can be measured, in clinical as well as normal cases, by the direct compensation technique. Intraocular straylight is known to originate from the cornea, lens and fundus. We have studied a fourth source: the translucency of the iris and surrounding ocular wall. For lightly-pigmented normal eyes this source proved to be important. In the present paper results are reported from a patient with X-linked megalocornea. He had diaphany of the iris, as is common in these patients, and photophobic complaints. Quantitative measurements showed that the translucency was much increased so that the intraocular straylight was far above the normal level.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Documenta ophthalmologica 78 (1991), S. 161-167 
    ISSN: 1573-2622
    Keywords: Intraocular implant lenses ; IOL ; non-monofocal lenses ; bifocal lenses ; multifocal lenses ; diffraction lenses ; modulation transfer function ; contrast sensitivity function ; straylight ; glare
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Non-monofocal IOLs are designed to give simultaneously sharp images of distant and near objects. This is achieved by means of different focal distances for various portions of the light reaching the eye. As a result, for any given object, one part of the light will be properly focused, while another part is out of focus. This results in a sharp image superposed on a blurred image, causing contrast loss. The retinal contrast loss as a function of spatial frequency is derived in this paper.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Documenta ophthalmologica 61 (1986), S. 327-333 
    ISSN: 1573-2622
    Keywords: stray light ; glare ; contrast sensitivity ; cataract ; corneal dystrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract For healthy eyes intraocular light scatter was investigated several decades ago. For pathological eyes, however, little is known. As clinical test several techniques have been proposed but none has gained general acceptance. A disadvantage of these tests was that quantities were estimated that related only indirectly to the amount of light scatter. We propose a method that gives a direct estimate of the light scatter. We studied patients with cataract, corneal dystrophy, iris and fundus hypopigmentation, etc. A remarkable finding was that visual acuity correlates rather weakly with the amount of scatter. Since, however, the amount of scatter causes a considerable loss of visual function, the results show that for these patients the visual acuity test gives a rather limited impression of their visual handicap. More attention to the problems associated with intraocular light scatter is needed.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Der Internist 39 (1998), S. 1237-1245 
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Lebertransplantation ; Leberversagen ; Lebertransplantation ; Hepatitis ; Therapie ; Leberzirrhose ; Therapie ; Transplantation ; Leber
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema Die ultima ratio der Lebertherapie, die Lebertransplantation, hat hierzulande und in aller Welt eine zunehmende Bedeutung gewonnen. Die Prognose der Lebertransplantation ist auch langfristig sehr günstig und hat sich aufgrund vieler Voraussetzungen in den letzten Jahren immer weiter verbessert. Nur die mangelnde Bereitschaft zur Organspende limitiert die Anzahl weiterer wünschenswerter Transplantationen, worauf – wieder einmal – hingewiesen sei. Da hauptsächlich über Indikation und Prognose informierte Ärzte am überzeugendsten in ihrem Umfeld auf einen Wandel zugunsten einer positiven Einstellung zur Organtransplantation bewirken können, sei diese Übersicht auch den nicht auf die Behandlung von Lebererkrankungen spezialisierten Kolleginnen und Kollegen empfohlen. Im Mittelpunkt der vorliegenden Arbeit stehen die Indikationen zur Lebertransplantation und deren Prognose. Da sich diese mit der Progredienz des Leidens im Hinblick auf das Transplantationsergebnis verschlechert, sollte bei bestehender Indikation die Lebertransplantation möglichst bald durchgeführt werden. Große Fortschritte wurden auch mit der möglichst individuellen Immunsuppression und antiviralen Therapie erzielt. Die Ergebnisse in der Entwicklung therapeutischer Systeme, die z.B. im Falle eines aktuen Leberversagens bis zur Bereitstellung eines Spenderorgans vorübergehend die Leberfunktion überbrücken helfen, sind ermutigend. Auch darüber wird referiert.
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