Table 3 Summary of myopia prevalence (%) from this study and from other studies published in recent 5Â years, matched on myopia definition and best matched on age
From: Refractive errors and visual impairment among children and adolescents in southernmost China
Country | Age (years) | n | Myopia% (≤ -0.50D) | High Myopia (≤ -6.00D) | Hyperopia% (≥ + 0.50 D) | Latitude | Cycl-oplegia |
|---|---|---|---|---|---|---|---|
Norway | 16–19 | 393 | 13 | 0.5 | 57 | 60.4° N | YES |
North India | 9–12 | 516 | 27 | NA | NA | 16.4° N | YES |
Brazilian | 9–11 | 266 | 6.4 | NA | 67.1 | 22.9° S | YES |
13–15 | 167 | 12.6 | 59.8 | ||||
Poland | 9–13 | 4875 | 14.01 | NA | NA | 52.1° N | YES |
Denmark | 9.7–15.4 | 307 | 17.9 | NA | NA | 55.8° N | YES |
France | 10–19 | 8289 | 42.7 | 1.8 | NA | 48.7° N | NO |
Korea | 5–19 | 7486 | 51.9 | 5.0 | 13.4 | 37.3° N | NO |
Netherlands | 6 | 5711 | 2.4 | NA | NA | 53.2° N | YES |
Saudi Arabia | 3–10 | 1,893 | 2.7 | NA | 1.5 | 24.3° N | NO |
Colombia | 15 | NA | 14.7 | NA | 32.3 | 5.1° N | NO |
Spain | 5–7 | 6152 | 20 | 3.6 | NA | 43.4° N | NO |
Indonesia | 8–12 | 410 | 32.68 | 8.54 | 0.73 | 6.1° S | NO |
Eastern China | 18 | 43,858 | 87.65 | 16.6 | NA | 29.4° N | NO |
Eastern China | 10–15 | 4890 | 52.02 | 5.7 | NA | 36.0° N | YES |
Northern China | 6–18 | 35,745 | 70.9 | 19.4 | NA | 40.2° N | NO |
Southern China | 7.2–12.2 | 1669 | 69.9 | 3.1 | NA | 23.2° N | NO |
Western China | 6–15 | 1858 | 54.9 | 2.42 | 3.0 | 29.0 N | YES |
Northern China | 6–12 | 527 | 53.9 | NA | NA | 38° N | YES |
Eastern China | 5–19 | 4801 | 63.1 | 9.4 | NA | 29.02° N | NO |
Our study | 6–15 | 31,524 | 45.97 | 0.96 | 13.80 | 20° N | NO |