Table 3 Refractive outcomes of Haigis and SRK/T formulas in patients with different axial lengths in the two groups.

Group	Without QCC group		QCC group		P value
Group	ME	MAE	ME	MAE	ME	MAE
Normal AL
Haigis	−0.09 ± 0.60	0.48 ± 0.38	−0.08 ± 0.44	0.31 ± 0.32	0.482	<0.001
SRK/T	−0.15 ± 0.59	0.49 ± 0.36	−0.02 ± 0.48	0.35 ± 0.33	0.064	<0.001
Long AL
Haigis	−0.69 ± 0.99	0.86 ± 0.83	−0.75 ± 0.75	0.78 ± 0.73	0.5414	0.9211
SRK/T	−0.55 ± 1.03	0.80 ± 0.84	−0.61 ± 0.85	0.71 ± 0.78	0.6153	0.5803
PhacoOptics	—	—	−0.09 ± 0.69	0.45 ± 0.52	<0.001*	0.0012*
Total
Haigis	−0.25 ± 0.77	0.58 ± 0.56	−0.31 ± 0.65	0.47 ± 0.54	0.6449	0.0058
SRK/T	−0.26 ± 0.75	0.57 ± 0.54	−0.22 ± 0.69	0.47 ± 0.55	0.5052	0.0081

QCC = Quality control circle, AL = Axial length, ME = Mean prediction error, MAE = Mean absolute prediction error. *The P value comes from comparing the results of PhacoOptics software with those of the Haigis and SRK/T formulas after the QCC activity.

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