منابع مشابه
Evaluation of the Friedmann Visual Field Analyser.
Visual fields were assessed in 320 eyes of 169 patients, using the Friedmann Visual Field Analyzer (F.V.F.A.) and the Oculus perimeter. The F.V.F.A. was found to be a rapid indicator of both the presence, the location and the density of scotomata. Because some defects were missed by the F.V.F.A. it should be used in combination with some other technique to search for early defects, particularly...
متن کاملSimulation of longitudinal threshold visual field data.
PURPOSE To describe and evaluate a computer model that simulates longitudinal visual field data. METHODS A computer model was designed using factors that influence thresholds of normal and glaucomatous visual fields. The simulation model was used to quantify the effects of fluctuation on the outcomes of pointwise linear regression by comparison with simulated gold standard data with no variab...
متن کاملVisual field test simulation and error in threshold estimation.
AIM To establish, via computer simulation, the effects of patient response variability and staircase starting level upon the accuracy and repeatability of static full threshold visual field tests. METHOD Patient response variability, defined by the standard deviation of the frequency of seeing versus stimulus intensity curve, is varied from 0.5 to 20 dB (in steps of 0.5 dB) with staircase sta...
متن کاملComparison of Swedish interactive threshold algorithm and full threshold algorithm for glaucomatous visual field loss.
PURPOSE To compare the prevalence of visual field loss, the sensitivity distribution, and the size and depth of glaucomatous visual field defects using the standard full threshold (FT) and the Swedish interactive threshold algorithm (SITA) standard (SS) procedures in patients with early or suspected glaucoma. METHODS Automated perimetry findings were retrospectively evaluated in 53 patients (...
متن کاملComparison of glaucomatous visual field defects using standard full threshold and Swedish interactive threshold algorithms.
OBJECTIVES To compare the severity, size, and depth of glaucomatous visual field defects using standard full threshold (FT), Swedish interactive threshold algorithm (SITA) standard (SS), and SITA fast (SF) algorithms of the Humphrey perimeter. METHODS A prospective observational case series of 77 patients with glaucoma performed FT, SS, and SF 30-2 white-on-white testing programs on the same ...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1971
ISSN: 0007-1161
DOI: 10.1136/bjo.55.10.704