Fig. 10.

The average radial variance maps for the light scatter for the second pass only based on Eq. (15). (a) $V(h_s)$ for the baseline data. The confidence interval U−L is uniform across the pupil and is 63.3 arcmin². (b) $V(h_s)$ for the TBU data. The confidence interval U−L is 75.06 arcmin². The radial variances for the spot images for the TBU data are larger than those for the baseline data (e.g. Max = 130.4 arcmin² for (a) and 175.3arcmin² for (b)). For the baseline data, although the raw spot images in Fig. 7(a) appear to be well focused, as Fig. 10(a) indicates, there still remains light scatter that has not been resolved by the aberrometer.