1Department of Ophthalmology, Zhengzhou Children's Hospital, Henan Children's Hospital, Zhengzhou
University Affiliated Children's Hospital, Zhengzhou 450000, China
2Department of Ophthalmology, Beijing Children Hospital, Capital Medical University, National Center for
Children’s Health, Beijing 100045, China
Abstract：Objective: To analyze the characteristics of biological parameters of anterior segment in children with high astigmatism. Methods: In this case-series study. A total of 82 cases with 82 eyes of children with astigmatism in Henan Children's Hospital from October 2020 to October 2021 were collected, including 64 children with high astigmatism (astigmatism 2.00 DC), and 18 children with moderate to low astigmatism (astigmatism<2.00 DC). Use SIRIUS three-dimensional corneal topography and anterior segment analysis system to determine the biological parameters of cornea and anterior chamber. Corneal parameters include corneal thinnest point thickness, corneal thinnest point position, central corneal thickness, corneal volume, corneal anterior and posterior surface K1, corneal anterior and posterior surface K2, corneal anterior and posterior surface spherical lens, corneal anterior and posterior surface cylindrical lens, optical zone 4 mm spherical lens, optical zone 4 mm cylinder; anterior chamber parameters include anterior chamber depth, horizontal iris diameter, iris corneal angle, and anterior chamber diameter. The biological parameters of the anterior segment were statistically analyzed by independent samples t test and one-way ANOVA. Results: There were no significant differences in anterior chamber parameters, corneal thickness and corneal volume between the high astigmatism group and the moderate-low astigmatism group. In the two groups, 97% and 89% of the corneal thinnest points were located in the inferior temporal area, respectively, the K1 value of the anterior and posterior corneal surfaces of the high astigmatism group was lower (t=-2.61, P=0.011; t=2.40, P=0.019), and the astigmatism of the anterior and posterior corneal surfaces and the 4 mm astigmatism of the optical zone were larger (t=-11.00, P<0.001; t=5.58, P<0.001; t=-10.25, P<0.001). Children in the higher astigmatism group had larger anterior chamber diameter, and the difference between the groups was statistically significant (F=3.03, P=0.036). The refractive state of the high astigmatism group was transformed into spherical equivalent. The smaller the spherical equivalent value, the greater the anterior chamber depth and angle, and the difference between the groups was statistically significant (F=11.12, P<0.001; F=5.07, P=0.009). Conclusions: The astigmatism of the anterior and posterior corneal surfaces of the children in the high astigmatism group and the 4 mm astigmatism of the optical zone are larger, the corneal thinnest point is mostly located in the inferior temporal area, the K1 value of the anterior and posterior corneal surfaces is lower, and the children in the higher degree of astigmatism group have a larger anterior chamber diameter, the smaller the spherical equivalent value of the high astigmatism group, the larger the anterior chamber depth and angle.
楚莹莹, 刘伟伟, 刘婷, 等.. 高度散光儿童眼前节生物学参数的特征分析[J]. 中华眼视光学与视觉科学杂志, 2022, 24(7): 530-535.
Yingying Chu1,Weiwei Liu1,Ting Liu1,et al. The Characteristic Analysis of Biological Parameters of Anterior Segment in Children with High Astigmatism. Chinese Journal of Optometry Ophthalmology and Visual science, 2022, 24(7): 530-535. DOI: 10.3760/cma.j.cn11-5909-20211208-00480
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