GLTGood Lite LEA GRATINGS Low Contrast Grating Acuity TestP14349152GLT-253400https://cdnimages.opentip.com/full/GLT/GLT-253400.jpgGood Lite LEA GRATINGS Low Contrast Grating Acuity Test These discs measure contrast sensitivity curve based on 4 gratings at 2 contrast levels: 10% and 2.5% contrast. These 2 levels use 2 grating frequencies: the 10% level uses 0.5 cpcm and 8 cpcm while the 2.5% level uses 0.5 cpcm and 4 cpcm. Testing is based on finding the distance where the person is at the threshold in seeing the direction of the grating lines. Includes nomograms, instructions, recording forms, and 2 double-sided discs.Dimensions: 8\" (20 cm) in diameter.Click here for the 253400 Guide.143491525.0000lbs3.009.0012.00
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These discs measure contrast sensitivity curve based on 4 gratings at 2 contrast levels: 10% and 2.5% contrast. These 2 levels use 2 grating frequencies: the 10% level uses 0.5 cpcm and 8 cpcm while the 2.5% level uses 0.5 cpcm and 4 cpcm. Testing is based on finding the distance where the person is at the threshold in seeing the direction of the grating lines. Includes nomograms, instructions, recording forms, and 2 double-sided discs.
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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