LEA SYMBOLS® Crowded Symbol Book (10 feet/3 meters)

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Variant of the line test for children or adults who have difficulty concentrating on a chart.
The center symbol is surrounded on four sides by symbols of the same size. The
interaction between the center symbol and the surrounding symbols is approximately
the same as in a line test. The test size is convenient and easy to administer during
screenings, home visits, and unique testing situations. Often, this is the first line test that
can measure visual acuity of a young child with amblyopia, because the test produces
the effect of crowding. Line sizes range from 20/63 to 20/16 (6/19 to 6/4.8) equivalent,
0.32 to 1.25. Includes response key and instructions. 16 offset pages for easy flipping.
5" x 5" (12.7 cm x 12.7 cm).. . . . . . . . . . . . . . . . . . . . . . . . . . . . 250700