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  • 1990-1994  (1)
  • 1980-1984  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 213 (1980), S. 291-298 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Leistung einer Untersuchung mit dem automatischen Computer-Perimeter (‚Competer’) kann in einer einzigen Zahl zusammengefaßt werden. Dieses Leistungsmaß wurde an einer Normalpopulation angewandt, um die physiologische Verschlechterung der retinalen Empfindlichkeit mit dem Altern festzustellen. Weiter wurde die Entwicklung des Leistungsmaßes in 54 Glaucomaugen verfolgt. Diese waren in drei Gruppen verteilt: unbehandelte, behandelte mit guter Druckeinstellung, und behandelte mit unbefriedigender Druckeinstellung. Alle Augen wurden mindestens zu drei verschiedenen Zeitpunkten perimetriert. Man fand ein signifikantes Übergewicht in Augen mit fallenden Leistungswerten. Eine Schutzwirkung durch drucksendende Behandlung konnte nicht gesichert werden. Papillenblutung und signifikanter Abfall der Leistung sind in der Regel in den gleichen Augen zu finden.
    Notes: Abstract Visual field information obtained with the automatic Computer-Perimeter (‘Competer’) can be condensed into a single numerical value. This performance measure was applied to a normal population to determine the physiologic decay of retinal sensitivity with aging. Further, the development of this performance measure was followed in 54 glaucoma eyes which were divided into three groups: Untreated, treated with satisfactory intraocular pressure (IOP) regulation, and treated with unsatisfactory IOP regulation. All eyes were examined perimetrically on at least three separate occasions. Decaying performance measures were found in the preponderance of glaucoma eyes. Therapy aimed at lowering the IOP did not offer a protective effect. Papillary hemorrhage and a significant decay in performance are usually found in the same eye.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 230 (1992), S. 24-28 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract If defined as diameter of image/diameter of object, the magnification M of the eye-camera system is kB, where k is a camera constant and B represents the vergence of the internal axis of the eye. The magnification may be assessed (1) from the length l of the eye, using the formula 1.336 k/(l-0.0016); (2) from the glass refraction G, using the formula kD/(1-G/D), in which D is the “normal” refractive power of the eye; or (3) from the principal point refraction A and the deviation ΔD 1 from the “normal” refractive power of the cornea, using the formula kD · (1 + Δ B/D), where ΔB = Δ + 0. 84 ΔD 1. If k is 0.042 m, as in the Zeiss camera, and D is about 60 dpt, the formulas may be written as (1) M= 0.056/(l-0.0016); (2) M=2.5/(1–0.017 G); and (3) M= 2.5 · (1 + 0.017Δ B).
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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