Determination of the time of refractive stability after uneventful phacoemulsification in Indian eyes

Table 2 Refractive stability at two follow up visits of 1 wk and 6 wk

Parameters	Post-operative visits			P value1
	1st wk	6th wk	Difference
Sphere				0.851
mean ± SD	0.04 ± 0.4	0.01 ± 0.3	0.1 ± 0.2
Median (IQR)	0 (0-0)	0 (0-0)	0 (0-0)
Range	-1.5 to 1	-0.75 to 1.5	0 to 1.5
Cylinder				0.695
mean ± SD	-0.3 ± 0.7	-0.2 ± 0.6	0.3 ± 0.4
Median (IQR)	-0.5 (-0.75 to 0.5)	-0.5 (-0.75 to 0.5)	0.25 (0 to 0.25)
Range	-3.5 to 1.5	-1.5 to 1.5	0 to 2.75
Spherical equivalent				0.277
mean ± SD	-0.05 ± 0.4	-0.07 ± 0.4	0.2 ± 0.2
Median (IQR)	0 (-0.25 to 0)	0 (-0.25 to 0)	0.12 (0 to 0.25)
Range	-1.75 to 1.37	-1 to 1.75	0 to 1.5

¹Wilcoxon Sign rank test to compare refractive error between 1^st wk and 6^th wk post-operative.

IQR: Interquartile range.