Table 4. Comparison between 1976 and the current study.
| Study | 1976 | Current study (2014, 2016 and 2018) |
|---|---|---|
| N | 1166 (1 year) | 4365 (3 years) |
| Age: Min~Max (Mean) | 5~16 | 6~15 (11.13) |
| Sex (%): male / female | 51.4 / 48.6 | 46.9 / 53.1 |
| Prevalence (%): male / female | ||
| Hypermetropia † | 7.1 / 13.1 | 14.0 / 19.8 |
| Myopia † | 3.3 / 3.8 | 7.4 / 7.3 |
| Astigmatism † | ||
| Right eye | 7.9 / 11.6 | 7.1 / 7.4 |
| Left eye | 6.6 / 7.8 | 6.6 / 7.5 |
Definition criteria (Study in 1976: in either eye data. myopia = spherical equivalent refraction (SER) < 0; hypermetropia SER greater than >1.25D; astigmatism: >0.75D.
† Prevalence of hypermetropia (myopia or astigmatism) in males means percentage of males with hypermetropia (myopia or astigmatism) in the total number of males.