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. 2010 Oct 18;7(6):342–353. doi: 10.7150/ijms.7.342

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© Ivyspring International Publisher. This is an open-access article distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by-nc-nd/3.0/). Reproduction is permitted for personal, noncommercial use, provided that the article is in whole, unmodified, and properly cited.

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Frequency histograms of spherical equivalent diopter data for (A) children in 6-8-year-old group (n=891), (B) 9-12-year-old group (n=1315), and (C) 13-15-year-old group (n=864). Values on the x-axis represent spherical equivalent diopter. The interval of each column is 0.25 D. Data were from the left eyes of 3070 school-age children.

Frequency histograms of spherical equivalent diopter data for (A) children in 6-8-year-old group (n=891), (B) 9-12-year-old group (n=1315), and (C) 13-15-year-old group (n=864). Values on the x-axis represent spherical equivalent diopter. The interval of each column is 0.25 D. Data were from the left eyes of 3070 school-age children.