4.11. Setting chart or box id ............................................................................................................................ 26
4.12. Setting the test call butons ...................................................................................................................... 27
1. Associate a test with a button .................................................................................................................................... 27
2. Change the position of a test ..................................................................................................................................... 27
3. Available tests ............................................................................................................................................................. 28
4.13. Setting the standby timeout .................................................................................................................... 31
5. How do I...? ............................................................................................................................. 32
5.1. How do I measure visual acuity? ........................................................................................................... 33
1. Call an optotype ......................................................................................................................................................... 33
2. Change the acuity ....................................................................................................................................................... 33
3. Change the optotypes distribution ............................................................................................................................. 33
4. Change the contrast ................................................................................................................................................... 33
5. Change the optotype masks ....................................................................................................................................... 33
6. Display optotypes on a red /green background ......................................................................................................... 34
7. Display optotypes in white on a black ground ............................................................................................................ 34
8. Modify the information bar ........................................................................................................................................ 34
9. Focus on an optotype/ Use cursor mode ................................................................................................................... 34
5.2. How do I use the special tests? ............................................................................................................... 35
1. Call a special test ........................................................................................................................................................ 35
2. Change a special test presentation ............................................................................................................................. 35
5.3. How do I use ETDRS mode? .................................................................................................................. 36
1. Change the reading distance ...................................................................................................................................... 36
2. Confirm the reading of a letter ................................................................................................................................... 36
3. Confirm the reading of an entire line ......................................................................................................................... 36
4. Confirm the no-reading of a letter .............................................................................................................................. 36
5. Change the distribution .............................................................................................................................................. 36
5.4. How do I return to the previous test?.................................................................................................... 36
5.5. How do I use contrast tests? ................................................................................................................... 37
1. How do I use the contrast of optotypes? .................................................................................................................. 37
2. How do I use Regan test (FSC)? .................................................................................................................................. 37
3. How do I use Pelli Robson test?.................................................................................................................................. 39
5.6. How do I use the Ishihara tests? ............................................................................................................ 40
1. Change the color range ............................................................................................................................................... 40
2. Change the palette within the same color range ....................................................................................................... 40
3. Return to the initial Ishihara test ................................................................................................................................ 40
5.7. How do I use the fixation points? .......................................................................................................... 41
1. Call the simple fixation point ...................................................................................................................................... 41
2. Call the child fixation point (Clown)............................................................................................................................ 41
3. Call the light fixation point ......................................................................................................................................... 41
4. Invert the background color (white/black) ................................................................................................................. 41
5. Call the hardware fixation light .................................................................................................................................. 41
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