Figure 4
Frequency histograms of C 4 0 and higher-order RMS error. (a) Frequency histograms of the spherical aberration coefficient, C4 0 for all subjects tested. Comparison between results derived from the direct (upper) and scaling (lower) methods for a 3 mm pupil. Bin width is 0.001. (b) Frequency histograms of the higher-order RMS error for all subjects tested. Comparison between results derived from the direct (upper) and scaling (lower) methods for a 3 mm pupil. Bin width is 0.0025.