Method and an apparatus for checking the thresholds of a subject

Details Method and an apparatus for checking the thresholds of a subject Method and an apparatus for checking the thresholds of a subject

1993-05-05

1995-10-24

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351222, 351224, A61B 302

Patent

active

054614350

ABSTRACT:
In a method of checking the threshold values of a subject's perception of visual stimuli, for each one of a selection of test series, the estimated error of a threshold value estimate of the test series is used to judge whether the test series is to be continued or not. This means that a test series may be discontinued as soon as the threshold value thereof can be determined with acceptable accuracy. Preferably, a posterior probability function is used for estimating the error. An apparatus for carrying out the method includes a control unit operating according to the method.

REFERENCES:
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patent: 4429961 (1984-02-01), Sheingorn
patent: 4697895 (1987-10-01), Sekiguchi et al.
patent: 4927259 (1990-05-01), Weber
patent: 5050983 (1991-09-01), Johnson et al.
Olsson, Jonny et al, "An Image Model For Quantal Response Analysis in Perimetry", Center for Stochastic Processes, University of North Carolina, Technical Report No. 355, pp. 1-26, Nov. 1991.
Jonny Olsson, "Statistics in Perimetry", Department of Mathematical Statistics, Lund University, 1991, pp. 1-39 and Appendices H-K.

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