Lea Low Contrast Grating Test

Lea Low Contrast Grating Test

253400
Regular price
$477.00
Sale price
$477.00

LEA Low Contrast Grating Acuity Test

 

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. Measures 8" (20 cm) in diameter.