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• Unstable (environmental) conditions may provoke accomodation for patient. This
reduces reliability index for measurement. In case of unstable measurement the following
warning message will appear on the display:
• The operator must apply the chart and the lens on the front side of the 2WIN into the
central aperture). Push the add-on (do not force the chart) until a slight resistance is felt.
Pay attention not to cover 2WIN frontal LEDs, measurement may not be possible
with a wrong chart positioning;
• Remove the add-on taking the black prominence and rotating it while pulling out towards
the outside.
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