SKU : 253400
Measurement of contrast sensitivity curve is based on 4 gratings at 2 Contrast levels, 10%, and 2.5% contrast using 2 grating frequencies: 0.5 cpcm and 8 cpcm (10% level) or 0.5 cpcm and 4 cpcm (2.5% le
Measurement of contrast sensitivity curve is based on 4 gratings at 2 Contrast levels, 10%, and 2.5% contrast using 2 grating frequencies: 0.5 cpcm and 8 cpcm (10% level) or 0.5 cpcm and 4 cpcm (2.5% level). Testing is based on finding the distance where the person is at threshold in seeing the direction of the grating lines. Includes nomograms, instructions, and recording forms.
Measurements: 8″ (20 cm) in diameter.
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