ETDRS® Chart Sets (3 Charts)
Sets of three ETDRS® charts — Chart 1, Chart 2, and Chart 3 — designed as alternate-form charts for use in rotation across repeat visits or to test each eye on a different chart. Browse by optotype family (Sloan, HOTV, Patti Pics, Tumbling E, Landolt C, PV Numbers, European Wide) at each of the four standard ETDRS testing distances.