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Table 3 Distribution of orientations of astigmatism in children aged 1–18 months

From: Refractive errors and risk factors for myopia in infants aged 1–18 months in Tianjin, China

Parameters With-the-rule astigmatism Against-the-rule astigmatism Oblique astigmatism
Age in months n (%) n (%) n (%)
1–3 48 (35.0%) 14 (10.1%) 4 (2.9%)
3–6 66 (46.2%) 17 (11.9%) 3 (2.1%)
6–9 62 (39.7%) 24 (16.0%) 3 (1.9%)
9–12 15 (20.5%) 9 (12.3%) 1 (1.4%)
12–18 19 (26.8%) 6 (8.5%) 0 (0%)
Total 210 (72.1%) 70 (24.1%) 11 (3.8%)
P 0.002 0.453 0.696