Table 2: Optical quality parameters of different pupil sizes in astigmatic eyes.

ParametersAstigmatismArtificial pupil size
2 mm4 mm6 mm

MTF cutoff frequency (c/deg)0 D
1 D
2 D
3 D

Strehl2D ratio0 D
1 D
2 D
3 D

ANOVA: analysis of variance, MTF: modulation transfer function, D: diopters.