Refraction and Ocular Biometry of Preschool Children in Shanghai, China

Table 3

Mean ocular biometry parameters (mean ± standard deviation) in the right eyes of 3- to 6-year-old children stratified by age and gender.

Characteristic	Age				P trend
	3	4	5	6
Axial length (mm)
Total	21.95 ± 0.68	22.18 ± 0.69	22.47 ± 0.71	22.63 ± 0.75	<0.001
Boys	22.21 ± 0.64	22.46 ± 0.61	22.70 ± 0.69	22.93 ± 0.68	<0.001
Girls	21.67 ± 0.61	21.87 ± 0.63	22.20 ± 0.63	22.22 ± 0.64	<0.001
value	<0.001	<0.001	<0.001	<0.001
Corneal radius (mm)
Total	7.81 ± 0.27	7.82 ± 0.27	7.86 ± 0.26	7.87 ± 0.28	<0.001
Boys	7.88 ± 0.26	7.90 ± 0.27	7.92 ± 0.27	7.95 ± 0.27	0.007
Girls	7.73 ± 0.25	7.74 ± 0.25	7.78 ± 0.23	7.76 ± 0.25	0.099
value	<0.001	<0.001	<0.001	<0.001