Table 2.

Mean refraction of the correcting glasses (±SD) and prevalence of astigmatism of all spectacle wearers (n = 128) depending on the age group

Age group	n	SE Right eye (D)	SE Left eye (D)	Prevalence of astigmatism
2–6 years	8	+2.81 ± 2.49	+3.16 ± 2.34	37.5%
7–11 years	13	+0.62 ± 2.75	+0.41 ± 2.15	15.4%
12–17 years	46	−1.20 ± 2.13	−1.23 ± 2.21	19.6%
18–35 years	61	−1.82 ± 2.20	−1.85 ± 2.10	32.8%
Total	128	−1.06 ± 2.54D	−1.09 ± 2.49D	26.3%