3-52
[Anterior]
This is the anterior elevation map.
[Posterior]
This is the posterior elevation map. The map is drawn in
reference to the front corneal center.
The reference sphere is automatically calculated by the
least-squares method to fit the corneal shape, with the
following settings.
[BFS Alignment]
●Float
Determine the reference sphere to best t the cornea.
●Axial
Determine the reference sphere so that its center is on
the axis passing through the vertex of the cornea.
●Apex
Determine the reference sphere so that the vertex of the
cornea coincides with that of the sphere.
[BFS Diameter]
The tting area to calculate the reference sphere can be
specied as a diameter.
The settings for the reference sphere described above
can be changed on the System Setup screen (refer to “3.9
System Setup”).
(Fig. 1)
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