Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers

Figure 1

Double-angle plots of differences in anterior corneal astigmatism measured by iTrace (a), IOLMaster 500 (b), and Pentacam (c). Note: centroid (solid square); 95% confidence of the ellipse of the centroid (red color); 95% confidence ellipse of the dataset (blue color); each ring = 1.0 D.

(a)

(b)

(c)