Table 2. Internal spherical aberration of groups 1, 2, and 3 as measured by iTrace according to pupil size (group 1: correlation analysis with implanted IOL diopter; group 2 and 3: one-sample t-test with theoretical SA).

	Group 1		Group 2		Group 3
	Measured value (μm, mean±SD)	P-value	Measured value (μm, mean±SD)	P-value	Measured value (μm, mean±SD)	P-value
6 mm	0.121±0.182	0.629	−0.227±0.253	0.566	−0.173±0.231	0.094
5 mm	0.116±0.105	0.001	−0.175±0.135	0.316	−0.072±0.128	0.242
4 mm	0.026±0.076	0.009	−0.068±0.047	<0.001	−0.032±0.086	<0.001
3 mm	−0.006±0.039	0.088	−0.041±0.057	<0.001	−0.017±0.029	<0.001

Abbreviations: IOL, intraocular lens; SA, spherical aberration; SD, standard deviation.