Essilor Instruments Vision-R 800, User Manual

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Choice of optotypes scale
It is possible to choose two types of optotypes scales:
1. Rational progression scale (in opposite and decimal acuity)
◦ letters
◦ numbers
◦ C of Landolt
◦ E of Snellen
◦ stylized figures
2. Logarithmic progression scale
◦ letters
◦ numbers
◦ C of Landolt
◦ E of Snellen
Once you have made your choice, press on the icon of the desired test. The visualization of the test is then
displayed at the bottom of the main screen:
The test display area allows you to:
• Visualize the optotypes presented.
• Display the acuity values in the unit chosen during configuration:
◦ decimal acuity (x/10)
◦ Snellen acuity in meters (6/x)
◦ Snellen acuity in feet (20/x)
The table of optotypes allows you to:
• Display the value of corresponding acuity,
• Display the unit of acuity.
Vision-R 800 - Essilor automatic phoropter > V1 - 12-2018
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SER MANUAL
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ERFORMANCE OF SPECIFIC TESTS DURING A REFRACTION EXAMINATION