This standardized adult vision assessment chart is designed to measure visual acuity with a standard line test and with three tighter spaced tests; 50%, 25%, and 12.5% which often reveal difficulties in seeing tightly crowded details. Line sizes range from 20/400 to 20/10 (6/120 to 6/3) equivalent, 0.05 to 2.00.

Testing distance: 16"/40 cm and 24"/60 cm for both sides of the chart.