OCULUS Pentacam - Case 2: Cylinder Undercorrection from Measurement of Keratometric Astigmatism in an Eye with ATRA

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20.2 Case 2: Cylinder undercorrection from measurement of
keratometric astigmatism in an eye with ATRA
An 85-year-old man underwent cataract surgery in OS. Axial length was 23.31 mm, and a 21.50 D
toric Acrysof was calculated for emmetropia. Traditional KA measurement (Figure 172) showed a
value of 1.9 161°, which was significantly lower than the Pentacam® TCRP at 3 mm (Figure 173),
measuring 2.8 D 160.3°.
Figure 172: Topometric showing a keratometric astigmatism of 1.9 D 161°
Figure 173: Corneal Power Distribution display with TCRP at 3 mm revealing a
higher astigmatism of 2.8 D 160.3°
20 Total corneal astigmatism for toric IOL