Inter- und intraindividuelle Streuung im EOG

Müller, Winfried; Haase, E.L.

doi:10.1007/bf00410813

Cited by 15 publications

(2 citation statements)

References 6 publications

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“…The clinical value of the indirect recording of the corneofundal potential (CFP) and its oscillations (electrooculography, EOG) has been under dispute since the promising reports of Fransois & de Rouck ( ), Fransois et al (1955( , 1956a( , 1956b( , 1957 and . The large dispersion of the test parameters is evident, and investigations focused on this aspect conclude that at present the EOG is an unsuitable tool for diagnosis and follow-up of pathological processes in the individual patient (Kelsey 1967, Miiller & Haase 1970, Hochgesand & Schicketanz 1974.…”

Section: Normal Values In Clinical Electrooculography I Material Mementioning

confidence: 99%

Normal Values in Clinical Electrooculography

Krogh

1975

Acta Ophthalmologica

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For the evaluation of normal EOG potential and time parameters a case series (142 eyes) is presented. An EOG technique aiming at the largest possible amplitude between the dark trough and the light peak is described. It is shown that the light-induced response following a 20 min period of adaptation to a very low degree of illumination (about 1/10 lx, allowing a rough orientation on the displayed trace) does not differ from that produced after 20 min of total darkness. Also, the independence of the pupillary area for the light-induced response is demonstrated, which means that the light stimulus employed (2500-4000 lx) is supramaximal. Furthermore, the good quality of the gaze fixation in the actual test situation with respect to the recording of equidistant saccades is proven. A DC amplification of the signal is used, which secures independency of inter- and intra-individual differences in the saccadic velocity and makes possible accurate measurements of deflections disfigured by correcting movements. The following EOG parameters are recorded: A base value after 10 min of preadaptation with the light stimulus, the dark trough and the light peak potentials. Also the periods between the beginning of the dark adaptation and the dark trough and between the dark trough and the light peak are noted. The frequency distribution and the general level of the various parameters are discussed in the light of comparable figures of previous publications.

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Section: Normal Values In Clinical Electrooculography I Material Mementioning

confidence: 99%

Normal Values in Clinical Electrooculography

Krogh

1975

Acta Ophthalmologica

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“…These factors cannot be controlled and the absolute potential is, therefore, thought to be less useful than the peak-to-trough ratio. Normative studies are available and point to a considerable intra-and interindividual varian ce [9][10][11].…”

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confidence: 99%