Now it's easy to measure, record and detect changes in the transfer of visual information when the change only affects visual acuity at low contrast levels. Chart presents numbers at the following contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%, in standard order. Pages are offset for easy flipping. Each chart includes recording forms and instructions. 6 pages measure 3.25" x 9" (8.25 cm x 22.9 cm).
|List Price (Product Availability)||Available through Eye Care Professionals Only.|
|Size (in)||3in by 9in|
|Size (cm)||8cm by 23cm|