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Investigation of ocular biometry in 4- to 9-year-old Chinese children
Ming-Hui Zhao1, Yi Song2, Jia-Li Liu2
1Department of Ophthalmology, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200071, China. zhao_m_h@163.com.
Insights
Ocular biometry in Chinese children aged 4-9 shows axial length and anterior chamber depth increase with age. Boys generally have larger ocular dimensions than girls, except for corneal curvature.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Biometry
Background:
- Understanding ocular biometry in children is crucial for monitoring visual development.
- Age- and gender-related differences in ocular parameters can influence refractive error progression.
Purpose of the Study:
- To determine the distribution and age-related changes in ocular biometry among Chinese children aged 4-9 years.
- To compare ocular parameters between genders in this pediatric population.
Main Methods:
- A cross-sectional study involving 1,528 Chinese children (aged 4-9) from schools and kindergartens.
- Measurements included axial length (AL), corneal curvature, anterior chamber depth, and corneal diameter.
- Data analysis compared parameters across different ages and between genders.
Main Results:
- Axial length and anterior chamber depth showed a gradual increase with age in both genders.
- Corneal curvature and corneal diameter remained stable across different ages.
- Males exhibited larger AL, anterior chamber depth, and corneal diameter, but flatter corneal curvature compared to females.
Conclusions:
- Axial length and anterior chamber depth increase significantly from ages 4 to 9 in Chinese children.
- Boys tend to have larger ocular dimensions than girls, with the exception of corneal curvature.
- Corneal diameter and curvature do not exhibit significant age-related changes in this age group.
Purpose:
To investigate the distribution and changes in ocular biometry in 4-to to 9-year-old Chinese children and to compare the differences between age and genders in these parameters.
Methods:
This was a school-based cross-sectional study. A total of 1,528 Chinese children, aged 4-9 years, from one primary school and 12 kindergartens, were included in the study. Axial length, corneal curvature, anterior chamber depth, and corneal diameter were measured for each child.
Results:
AL and anterior chamber depth gradually increased with age in both genders. No significant changes in corneal curvature or corneal diameter were detected at different ages in either genders group. The mean ALs of males and females were 22.94 ± 0.80 mm and 22.38 ± 0.79 mm, respectively. The mean corneal curvatures of males and females were 43.05 ± 1.37 D and 43.75 ± 1.48 D, respectively. The mean anterior chamber depth of males and females were 3.47 ± 0.24 mm and 3.38 ± 0.25 mm, respectively. The mean corneal diameter of males and females were 12.08 ± 0.43 mm and 11.94 ± 0.44 mm, respectively. Females had consistently shorter ALs, shorter anterior chamber depth, smaller corneal diameter, and steeper corneal curvatures than males at any age.
Conclusions:
Boys had larger dimensions than girls for all ocular parameters except corneal curvature (flatter). Boys and girls showed similar trends for all parameters. Axial length and anterior chamber depth increased from 4 to 9 years of age, whereas corneal diameter and curvature did not change with age in either genders.
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