Low Contrast Flip Chart with a different sequence of Lea Numbers from Good-Lite (Formerly Richmond Products, Inc.)

These Low Contrast Flip charts contain 5 pages of various contrast levels showing 5 Lea Numbers® on each page. Optotype size is 9.5M. Contrast levels are 25%, 10%, 5%, 2.5% and 1.25%. These flip charts can be used at several different distances. These two sets are used for the same test. Each offers a different set of symbols to guard against memorization. Includes instructions. Measures 9"x 3 1.4" (23x8.25cm). Product includes soft-tipped pointer, recording forms (P/N 215400) and instructions. 36 months to 7 years.