Some aspects of the automation of perimetry

Fankhauser, Franz; Spahr, Jürg; Bebie, Hans

doi:10.1016/0039-6257(77)90094-7

Cited by 61 publications

(34 citation statements)

References 8 publications

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“…Despite the fact that the relatively large Goldmann stimulus size III decreases refractive influences [6,17], an appropriate refraction for automated peripheral visual field measurements in myopic eyes is necessary. Our study shows that in eyes with higher myopia relative defects in the peripheral visual field might only reflect the lack of refractive error correction.…”

Section: Discussionmentioning

confidence: 99%

Influence of refractive correction on peripheral visual field in static perimetry

Koller

Haas

Zulauf

et al. 2001

Graefe's Arch Clin Exp Ophthalmol

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Section: Discussionmentioning

confidence: 99%

Influence of refractive correction on peripheral visual field in static perimetry

Koller

Haas

Zulauf

et al. 2001

Graefe's Arch Clin Exp Ophthalmol

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“…Hence, a succession of maximum four missing responses should lead to the presentation of a suitably supraliminal target. This also serves to catch any faults in attention (Fankhauser et al, 1977). Irrespective of the actual mode of fixation checking, errors of fixation should not only be recorded, but also displayed as reminders.…”

Section: Aiding and Checking Fixationmentioning

confidence: 99%

Computerized perimetry: Possibilities for individual adaptation and feedback

Frisén

1988

Doc Ophthalmol

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Computerized perimetry is often poorly accepted by the tested subjects, presumably because of sparse feedback and lack of adaptation to individual capacity. Several remedies are suggested, including visual response feedback, active correction of erroneous responses, various fixation prompts, and continuous adaptation to current reaction time. Intuitively intelligible result displays are also desirable. A novel format representing threshold level by symbol size may meet this need.

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“…Visual thresholds are determined in all positions. This method is used in the original Octopusprograms (9) and in the Competer threshold program (22). The reliable determination of each luminance threshold requires several stimulus-presentations (typically 4 to 6 (3, 21)).…”

Section: Strategiesmentioning

confidence: 99%

Concepts for automatic perimetry, as applied to the Scoperimeter, an experimental automatic perimeter

et al. 1982

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The development of an experimental automatic perimeter, the Scoperimeter, is described. We use an oscilloscope as campimeter screen for the examination of the central 25 degrees of the visual field. The oscilloscope beam generates a homogeneous background luminance (0.1 cd/m2) and single stimulus static stimuli in any given position. The effective luminance-range of the stimuli is 3.0-3.5 log.unit. The visual field examination is controlled by a small computer system. Four examination programs written in Basic, are described. The screening programs using threshold related suprathreshold stimuli appear to be the most efficient compromise between speed and accuracy of the examination. The printout of these programs consists of a noninterpolated grey-scale presentation. Other programs perform static meridional perimetry or measure luminance threshold in 60 regularly distributed positions in the visual field. We have taken into consideration the factors that may influence the outcome of the examination: the presence of an instruction phase, the possibility to follow the progress of the examination and careful stimulus-timing. In a second paper we present clinical results we obtained using our instrument.

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Some aspects of the automation of perimetry

Cited by 61 publications

References 8 publications

Influence of refractive correction on peripheral visual field in static perimetry

Influence of refractive correction on peripheral visual field in static perimetry

Computerized perimetry: Possibilities for individual adaptation and feedback

Concepts for automatic perimetry, as applied to the Scoperimeter, an experimental automatic perimeter

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