LEA GRATINGS™ Acuity Test

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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 LEA GRATINGS. The test gratings are
presented to children and adults at different
distances to determine 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, and storage case.
4 disks 8" (20 cm) in diameter.
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