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Includes response key, training cards, and instructions.
Good-Lite LEA Symbols Crowded Symbol Book
The Good-lite Crowded Symbol Book was created for testing children and adults who have trouble reading the ototypes on the large charts. This test is the smallest line test when the central symbol is used as the test symbol. The four symbols surrounding the central symbol interfere with the recognition of the central symbol closely, the same way they do in line acuity charts. Due to the crowding effect, it often allows measurement of line acuity of young children much earlier than the visual acuity charts and therefore helps in detecting amblyopia or impaired vision early.
- Line sizes from 20/63 to 20/16 (6/19 to 6/4.8) equivalent, 0.63 to 1.25.
- 16 offset pages.
- Testing distance: 10 feet.
|Type of product||Vision Assessment Book|
|Minimum Shipping latency||3|