LEA NUMBERS® Low Contrast Charts for Illuminated Cabinet

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A low contrast test is a special way to
measure acuity to determine how well
eyes function in low light situations and/
or to determine how well eyes distinguish
objects from similarly colored or shaded
backgrounds. Testing is identical to the
measurement of visual acuity at high contrast
level. The 2.5% test is the most practical test
in clinical use. Available in 5 contrast levels:
1.25%, 2.5%, 5%, 10%, and 25%. Includes
response key, training cards, recording
forms, and instructions.
A 1.25% . . . . . . . . . . . . . . . . . . . . . .271500
B 2.5% . . . . . . . . . . . . . . . . . . . . . . .271600
C 5% . . . . . . . . . . . . . . . . . . . . . . . .271700
D 10% . . . . . . . . . . . . . . . . . . . . . . .271800
E 25% . . . . . . . . . . . . . . . . . . . . . . .271900