Table 2 Preoperative and postoperative correlations of halo disturbance index (%) with pupil size (mm) and high order aberration (μm) of the front corneal surface (n = 83 eyes).

	Preoperative		Postoperative
	Pearson correlation	p Value	Pearson correlation	p Value
HDI vs pupil size	0.098	0.381	0.126	0.258
HDI vs total Rms	0.299	0.006**	0.426	<0.001**
HDI vs trefoil	0.128	0.248	0.142	0.200
HDI vs coma	0.180	0.104	0.250	0.023*
HDI vs tetrafoil	0.218	0.048*	0.129	0.245
HDI vs secondary astigmatism	0.101	0.366	0.368	0.001**
HDI vs spherical aberration	0.397	<0.001	0.408	<0.001**
HDI vs pentafoil	0.195	0.077	0.134	0.228

*Statistically significant at α = 0.05; **statistically significant at α = 0.01.

HDI, halo disturbance index; Rms, root mean square.