. 2016 Mar 23;6:23482. doi: 10.1038/srep23482

Table 4. Corneal epithelium thickness in the central (2-mm diameter), para-central (2 to 5-mm diameter), and peripheral (5 to 6-mm diameter), according to each age interval in 614 normal Chinese children.

	Age
	7		8		9		10		11		12		13		14		15		Total
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
	n = 54		n = 43		n = 63		n = 62		n = 86		n = 93		n = 88		n = 88		n = 37		n = 614
C	53.24	2.84	52.33	2.38	53.38	2.86	53.74	2.36	53.22	2.69	53.68	3.07	54.01	2.61	53.76	2.98	54.78	3.38	53.58	2.84
S1	52.61	2.72	51.37	2.41	52.10	2.61	52.29	2.29	51.88	2.51	52.11	2.85	52.63	2.69	52.13	2.84	52.05	3.40	52.16	2.70
S2	51.74	2.83	50.79	3.17	51.40	2.69	51.48	2.49	50.65	2.33	50.55	3.17	50.82	3.25	50.14	3.43	49.73	3.52	50.80	3.03
ST1	52.00	2.69	50.70	2.39	51.81	2.99	51.94	2.35	51.76	2.64	52.13	2.76	52.90	2.75	52.53	2.79	52.76	3.37	52.12	2.78
ST2	51.39	3.34	50.67	2.39	51.25	3.10	51.45	2.36	51.27	2.46	51.49	2.67	52.17	2.70	51.63	2.67	51.35	3.08	51.47	2.74
T1	51.65	2.95	50.72	2.25	51.97	2.83	52.02	2.91	52.01	2.67	52.56	2.72	53.31	2.58	53.05	2.97	54.14	3.58	52.43	2.91
T2	51.15	2.82	50.44	2.21	51.41	2.68	51.55	2.92	51.87	2.64	52.24	2.55	52.93	2.54	52.70	2.83	53.73	3.42	52.07	2.82
IT1	52.61	3.18	51.63	2.28	52.83	2.95	53.26	2.57	52.99	2.63	53.54	2.91	54.13	2.51	54.05	3.14	55.30	3.41	53.41	2.94
IT2	52.54	3.62	51.56	2.27	52.60	2.97	53.27	2.31	53.33	2.62	53.72	3.03	54.14	2.59	54.05	3.15	55.11	3.14	53.44	2.98
I1	53.52	2.98	52.56	2.41	53.70	3.00	54.03	2.33	53.81	2.50	54.26	2.97	54.69	2.48	54.69	3.22	55.81	3.49	54.15	2.90
I2	53.65	2.93	52.79	2.59	53.62	3.07	54.16	2.48	54.19	2.65	54.58	3.29	54.88	2.53	54.82	3.30	55.89	2.92	54.33	2.97
IN1	53.59	2.74	52.74	2.41	53.71	2.80	54.00	2.17	53.67	2.38	54.11	2.89	54.69	2.27	54.44	2.88	55.62	3.43	54.08	2.71
IN2	53.57	2.77	52.86	2.46	53.46	2.64	53.84	2.07	53.67	2.31	54.09	3.06	54.61	2.36	54.41	2.92	55.38	3.46	54.01	2.72
N1	53.19	2.72	52.35	2.39	53.19	2.63	53.58	2.33	53.14	2.40	53.72	2.75	54.28	2.45	53.93	2.71	54.78	3.20	53.60	2.65
N2	53.43	2.70	52.63	2.37	53.00	2.48	53.42	2.27	53.20	2.24	53.62	2.67	54.24	2.40	53.81	2.59	54.30	3.32	53.55	2.56
SN1	52.96	2.78	52.09	2.34	52.67	2.65	52.97	2.35	52.47	2.50	52.96	2.87	53.43	2.58	52.90	2.68	53.22	3.32	52.87	2.67
SN2	53.11	3.06	51.98	2.72	52.49	2.55	52.68	2.45	52.06	2.37	52.18	2.79	52.45	2.82	51.92	2.93	51.65	3.64	52.28	2.79

C: Center 2-mm, S1: Superior 2–5 mm, S2: Superior 5–6 mm, ST1: Superior Temporal 2–5 mm, ST2: Superior 5–6 mm, ST1: Temporal 2–5 mm, ST2: Temporal 5–6 mm, IT1: Inferior Temporal 2–5 mm, IT2: Inferior Temporal 5–6 mm, I1: Inferior 2–5 mm, I2, Inferior 5–6 mm, IN1: Inferior Nasal 2–5 mm, IN2: Inferior Nasal 5–6 mm,N1: Nasal 2–5 mm, N2: Nasal 5–6 mm, SN1: Superior Nasal 2–5 mm, SN2: Superior Nasal 5–6 mm, SD: Standard Deviation.