Lea Numbers Low Contrast Test
Now it is easy to measure, record and detect changes in the transfer of visual information when the change only affects visual acuity at low contrast levels. This chart presents numbers at the following contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%. Pages are offset for easy flipping. Each chart includes recording forms and instructions. 6 pages.
Lea Numbers Low Contrast Test