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Table 2 The percentage of children with different severities of myopia stratified by age

From: Prevalence of myopia in 3–14-year-old Chinese children: a school-based cross-sectional study in Chengdu

Age (N) Myopia Categories (N1)
Low Moderate High
3 (159) 1.9 % (3) 0.0 % (0) 0.0 % (0)
4 (235) 1.7 % (4) 0.9 % (2) 0.0 % (0)
5 (234) 1.3 % (3) 0.4 % (1) 0.0 % (0)
6 (2304) 8.2 % (189) 0.3 % (7) 0.1 % (3)
7 (2936) 13.5 % (395) 0.9 % (27) 0.2 % (5)
8 (2621) 23.0 % (602) 2.6 % (68) 0.3 % (8)
9 (2431) 31.3 % (762) 5.5 % (133) 0.4 % (9)
10 (2336) 36.3 % (849) 11.4 % (266) 1.0 % (23)
11 (2210) 38.6 % (854) 15.9 % (351) 1.9 % (43)
12 (1623) 39.1 % (634) 23.1 % (375) 4.1 % (66)
13 (1429) 39.2 % (560) 26.7 % (382) 6.2 % (89)
14 (937) 34.3 % (321) 32.1 % (301) 8.5 % (80)
  1. N: number, N1: the number of myopic children