Table 3.

Comparison with Indian normative data of other studies.

Thickness parameters	OCT considering IS/OS RPE junction as outer retinal border (1)	OCT considering outer RPE surface as outer retinal border (2)	OCT considering inner RPE surface as outer retinal border (3)	p	1 vs 2	1 vs 3	2 vs 3
	Stratus4	Spectralis5	Copernicus (current study)
Central foveal thickness	149.16 ± 21.15	220.96 ± 13.76	173.83 ± 18.16	<0.0001	<0.0001	<0.0001	<0.0001
Mean retinal thickness (1 mm)	181.15 ± 18.42	260.10 ± 18.19	190.21 ± 26.31	<0.0001	<0.0001	<0.0001	<0.0001
3 mm radius
Superior	254.65 ± 20.99	337.95 ± 17.46	269.47 ± 25.22	<0.0001	<0.0001	<0.0001	<0.0001
Inferior	256.19 ± 18.83	335.53 ± 17.87	285.03 ± 22.85	<0.0001	<0.0001	<0.0001	<0.0001
Temporal	223.69 ± 25.05	324.90 ± 16.35	269.19 ± 23.65	<0.0001	<0.0001	<0.0001	<0.0001
Nasal	257.90 ± 20.54	338.88 ± 18.17	276.29 ± 26.07	<0.0001	<0.0001	<0.0001	<0.0001
6 mm radius
Superior	228.08 ± 15.72	295.62 ± 14.71	292.50 ± 16.67	<0.0001	<0.0001	<0.0001	0.192
Inferior	217.86 ± 15.19	283.46 ± 15.25	287.29 ± 17.53	<0.0001	<0.0001	<0.0001	0.094
Temporal	209.48 ± 16.88	281.60 ± 14.21	279.00 ± 15.49	<0.0001	<0.0001	<0.0001	0.16
Nasal	245.09 ± 16.75	312.23 ± 17.08	303.29 ± 16.29	<0.0001	<0.0001	<0.0001	0.001

p < 0.05 is statistically significant.