| 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. | Adult Near-Contrast Test Booklet provides contrast sensitivity levels of 100, 25, 10, 5 and 2.5 percent using Michelson measures. These are printed on high-quality styrene plastic for long term durability. Each contrast level has ETDRS style letters | 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. | 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. | 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. |
| Features | Inquire | - Contrast Levels 100%, 25%, 10%, 5%, 2.5%
- Both ETDRS Letters and Continuous Reading Examples
- 20/400 to 20/10 in 17 increments
- Shows Snellen in Feet/ Meters, LogMAR, Decimal and Letter Size
- Pages tabbed at each contrast level
- Includes Instructions, Score Card and Recording Form
| Inquire | Inquire | Inquire |