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10 Screening for refractive surgery
This 4 Maps Selectable display
(Figure 60)
shows a normal with-the-rule astigmatic cornea (astig.
4.1 D). Both the anterior and posterior elevations have a similar pattern, as does the anterior
sagittal curvature. The anterior elevation map is symmetric, and the curvature shows a symmetric
astigmatic pattern. The pachymetry map is well centered with a thinnest reading of 522 μm.
DIAGNOSIS - normal astigmatic eye
Figure 60: 4 Maps Selectable showing an astigmatic cornea
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