Tumbling 'E' Chart - The Tumbling ' E ' chart can be accessed by hitting the ' E ' key. This optotype is great for children or illiterates. Chart - The Tumbling ' C ' chart is accessed by hitting the ' C ' key. Again, great for kids or illiterates. The number chart, just like the Tumbling C or E chart helps with those patients who may have trouble with letters.
Access is by pressing the 'N' key.
This feature will R andomize any optotype that is on screen. It makes acuity testing much more accurate by generating a random sequence of letters so that memorization of the current letter size is no longer an issue. It works with all optotypes and is initiated by hitting the ' R ' key or the ' R efresh' button. Remember, the default letter sequence we all know is the first sequence presented for each snellen size so you don't have to worry about looking at the chart each time you change size. Even if you have 'Randomized' the current display, by changing the size up or down, you will get the standard sequence for the next set of letters.