Low Contrast Flip Chart with a different sequence of Lea Numbers
Description: 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...Low Contrast Flip Chart with Lea Numbers
Description: 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...Low Contrast Flip Chart with Lea Symbols
Description: They employ Lea Symbols. Contrast levels are the same at 25%, 10%, 5%, 2.5% and 1.25%. Each offers a different set of Lea Symbols to guard against memorization. Also uses recording forms (P/N 215400). Legend card provided....Low Contrast Flip Chart Recording Pad
Description:... They employ lea Symbols. Contrast levels are the same at 25%, 10%, 5%, 2.5% and 1.25%. Each offers a different set of lea Symbols to guard against memorization. Also uses recording forms (P/N 21540...