Table 3.

P values comparing various groups. Group 1: 32% laser power for − 2.0D treatment), group 2: 64% laser power for − 2.0D treatment, group 3: 32% laser power for − 5.0D treatment and group 4: 64% laser power for − 5.0D treatment). The anterior lenticular surface periphery & centre, anterior cap centre, posterior lenticular periphery & centre and posterior stromal base centre and periphery scans were analysed. (AL-P = anterior lenticule surface periphery; AL-C = anterior lenticule surface centre; CP-C = centre of cap’s posterior surface; PL-P = posterior lenticule surface periphery; PB-P = posterior stroma base periphery; PL-C = posterior lenticule surface centre; PB-C = posterior stroma base centre.)

		A : Surface relief (X400)	B : Regularity of surface structure (X800)	C : Portions of irregular surface (X800)	D : Size of the irregular area (X800)
Group 1 vs 3	AL-P	0.05	0.38	0.05	0.04*
	AL-C	0.48	0.06	0.07	0.04*
	CP-C	0.75	1.00	0.37	0.66
	PL-P	0.22	0.74	0.38	0.27
	PB-P	0.21	0.45	0.49	0.79
	PL-C	1.00	0.46	0.27	0.32
	PB-C	0.16	0.48	0.57	0.16
Group 2 vs 4	AL-P	0.38	0.76	1.00	0.75
	AL-C	1.00	0.27	0.52	1.00
	CP-C	1.00	0.17	0.85	0.62
	PL-P	0.30	0.79	0.83	0.30
	PB-P	0.46	0.30	0.85	1.00
	PL-C	0.56	0.54	0.42	0.52
	PB-C	0.72	0.69	0.83	0.76
Group 1 vs 2	AL-P	0.45	0.10	0.14	0.04*
	AL-C	0.17	0.05	0.14	0.76
	CP-C	0.68	0.51	0.44	0.35
	PL-P	0.51	0.27	0.59	0.10
	PB-P	0.59	0.21	0.38	1.00
	PL-C	0.51	0.35	0.04*	0.35
	PB-C	0.17	0.68	0.51	0.05
Group 3 vs 4	AL-P	0.63	1.00	0.47	0.34
	AL-C	0.79	0.16	0.21	0.12
	CP-C	0.60	0.51	0.62	0.53
	PL-P	0.01*	0.06	0.30	0.11
	PB-P	0.74	0.18	1.00	0.81
	PL-C	0.13	0.52	0.72	0.32
	PB-C	1.00	1.00	1.00	0.80

*statistically significant.