Good-Lite Good Lite Lea Crowded Symbol Book Set
"Features of the Good Lite Lea Crowded Symbol Book Set: 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 and home visits. 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 from 20/63 to 20/16 (6/19 to 6/4.8) equivalent. Includes response key, flash cards, and instructions. 16 pages, 5"" x 5"" (12.7 cm x 12.7 cm). 10 feet, 3 meters testing distance." crackcrackcrackcrack
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