A Resolving/Discrimination Test
This test at full contrast requires discrimination of the direction of long lines, which is a more demanding task than the detection acuity measured with the LEA GRATINGS® Acuity Test. The test gratings are presented to children and adults at different distances to determine at which distance the direction of lines can be perceived. Knowing the distance and which grating was used, the grating acuity values can be read from the nomograms. Includes nomograms, instructions, a storage case, and 4 disks.
Dimensions: 8" (20 cm) in diameter.
Note: All products sold on Accuspire.com should be used by qualified clinician and should be purchased by or on order of a qualified clinician.
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 NECO(New England College of Optometry) Near Visual Acuity Card has LEA NUMBERS® with line sizes of 20/400 to 20/10 distance equivalent on one side. The other side features LEA...
A LEA SYMBOLS® pediatric eye chart with proportionally spaced (logMAR) lines; line sizes range from 20/80 to 20/8 (6/24 to 6/2.4). The other equivalents featured on this chart are decimal...
3 in 1 Near Visual Acuity Test contains 3 different optotypes in one easy to use chart; LEA SYMBOLS®, LEA NUMBERS®, and Sloan Letter. The near vision card contains lines with proportionally spaced...
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