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The EOG test is divided into two parts: a light and a dark test. The adaptation period is extended to 30 min. During this adaptation period the luminance in the cabin decreases (or increases) slowly to the starting value of the light or dark step. In a model, we studied the influence of this ramplike luminance course on the results. Standard values for the test were calculated with 30 test persons. Our test results show a lower relative standard deviation (V = 10%) compared with earlier published results.

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