Visionix VX40 - How to Measure a Frame?

How to?
VX40 User Guide
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6.1 How do I measure a frame?
Go to frame interface
If the frame interface is not displayed:
 Click on (frame interface button).
The frame holder moves to the center of the device.
Place the frame
 Position your fingers on either side
of the Frame Holder.
 Push the sides of the Frame Holder
in the direction of the arrows until
you hear a “click”.
 Place the frame in the holder by
pushing the knob in the direction of
the arrow.
 Verify that the bridge of the frame is not higher than the level of the nose pad of
the Frame Holder.
Good
No good
Figure 6-1: Placing the Frame Holder