Table 4.

Previous studies presenting data on optic nerve head parameters of children.

				ONH parameters, mean ± SD
Studies, year	Subjects	N	Age (years)	Disc area (mm2)	Rim area (mm2)	Cup area (mm2)	Cup volume (mm3)	C/D area	V C/D	H C/D
Photographic studies
Mansour12, 1992	Healthy volunteers	66	2–10	2.93 /2.81*	2.50 /2.54*
Hellström13, 1998	Healthy volunteers	100	3–20	2.69 ± 0.44	2.24	0.44 ± 0.32
Samarawickrama14, 2012	Population based	1225	6	2.29		0.48			0.40
HRT studies
He15, 2008	Population based	557	7–15	1.98 ± 0.15		0.51 ± 0.31		0.24 ± 0.12
Pang16,2009	Hospital based	146	6–17	2.18 ± 0.57	1.63 ± 0.40	0.52 ± 0.37		0.22 ± 0.11
Larsson17, 2011	Population based	54	5–16	2.16 ± 0.47	1.75 ± 0.39	0.41 ± 0.33	0.09 ± 0.12	0.18 ± 0.12
TD-OCT studies (Stratus OCT)
El-Dairi4, 2009	Hospital based	286	3–17	2.42	1.96	0.47		0.2	0.37	0.43
Huynh2, 2006	Population based	1309	6–7	2.20 ± 0.39	1.76 ± 0.44	0.48 ± 0.32	0.06 ± 0.07	0.22 ± 0.13	0.42 ± 0.15	0.46 ± 0.16
Huynh6 2008	Population based	2054	11–14	2.34 ± 0.41	1.93 ± 0.42	0.46 ± 0.32		0.21 ± 0.14	0.39 ± 0.14	0.44 ± 0.16
SD-OCT studies
Elia3, 2012, Cirrus	Community based	358	6–13	2.05	1.59			0.43
Bueno-Gimeno21, 2014, Cirrus	Hospital based	199	6–17	2.09 ± 0.44**	1.67 ± 0.34**			0.36 ± 0.17**
				1.85 ± 0.34***	1.58 ± 0.28***			0.32 ± 0.19***
Bhoiwala5, 2015, RTVue	Community based	77	5	2.01 ± 0.40		0.36 ± 0.34			0.32 ± 0.22	0.38 ± 0.24
Present study, 2015, Optovue	Hospital based	128	5–17	2.30 ± 0.42	1.84 ± 0.45		0.09 ± 0.10	0.20 ± 0.13	0.37 ± 0.17	0.45 ± 0.20

Note. C/D = cup to disc ratio; ONH = optic nerve head; V = vertical; H = horizontal.

*Boys /girls.

**Emmetropic.

***Myopic.