Figure 58
Astigmatism: Astigmatism at 3 and 5 mm (or 2 and 4 mm)
Pupil Avg: Average pupil power for a pupil of 4.5 mm
Asphericity: Asphericity of the cornea at 8 mm diameter
Spherical Aberration: Longitudinal spherical aberration of a 4.5mm diameter cornea area
Curvature Irregularity: Irregularity of curvature calculated on the standard deviation of the
instantaneous readings for a 4.5mm diameter cornea area
Asymmetry + SAI: Asymmetry between the most curved hemisphere and the flattest one calculated
for 4.5mm diameter cornea area and an SAI (Surface Asymmetry Index) that represents the surface
asymmetry index of the 4.5mm diameter cornea area.
Keratoconus
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