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405, p=0.005). The distribution of astigmatism in eyes with laser-treated ROP and age-matched controls is shown in Fig.?2. In control population, more than 80% had http://www.selleck.cn/products/JNJ-26481585.html ROP showed more than 80% with more than 1.0?D astigmatism and peaked at more than 3.0?D astigmatism (50%). The biometric optic components in preterm children with ROP showed that the lens thickness was 3.94 �� 0.33?mm (range: 3.27�C4.62), anterior chamber depth, 2.91?��?0.34?mm (range: 2.26�C3.46); axial length, 23.32 �� 1.17?mm (range: 20.93�C25.39); and corneal radius, 7.73?��?0.34?mm (range: 7.24�C8.65). A comparison of the biometric optic components between eyes of preterm children with laser-treated threshold ROP and age-matched full-term controls in detail is shown in Table?1. Compared with age-matched control subjects, the eyes with laser-treated ROP showed significantly thicker lens (3.94 versus 3.39?mm) (p? http://www.selleckchem.com/products/epz-6438.html full-term controls. However, there was no difference in terms of axial length between the two groups (23.32 versus 23.24?mm) (p?=?0.741). To clarify the correlation of prematurity status with optic components in ROP eyes, Pearson correlation analysis showed preterm children with lower BW or younger GA tended to have shallower ACD, thicker lens or steeper cornea (Table?2). In preterm children, lower birth body weight tended to correlate with shallower ACD (r?=?0.372, p?=?0.074) and steeper cornea (r = 0.360, p?=?0.084); younger gestational age tended to correlate with http://www.selleckchem.com/products/PD-0325901.html shallower ACD (r?=?0.352, p?=?0.091) and thicker lens (r?=??0.298, p?=?0.157). However, there was no statistically significant difference, which may be due to the relatively small sample number (n?=?24). To analyse the contributing factors to the prediction of myopia in eyes of preterm children with laser-treated threshold ROP, all quantified data were incorporated in multivariate statistical analysis. The analysis showed the myopia in ROP children can be predicted by a combination of optic components. The prediction equation for spherical equivalent is shown as below: The R square was 0.732. This study presents the long-term biometric optic components and refractive outcome of laser-treated threshold ROP in children at the age of 9?years. Comparing with control subjects, there were higher prevalence and greater magnitude of myopia and astigmatism in eyes with laser-treated ROP.