Paraxial schematic eye models for 7- and 14-year-old Chinese children

Li, Shi-Ming, Wang, Ningli, Zhou, Yuehua, Li, Si-Yuan, Kang, Meng-Tian, Liu, Luo-Ru, Li, He, Sun, Yun-Yun, Meng, Bo, Zhan, Si-Yan, & Atchison, David A. (2015) Paraxial schematic eye models for 7- and 14-year-old Chinese children. Investigative Ophthalmology and Visual Science, 56(6), pp. 3577-3583.

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Abstract

Purpose

  • To develop three-surface paraxial schematic eyes with different ages and sexes based on data for 7- and 14-year-old Chinese children from the Anyang Childhood Eye Study.

Methods

  • Six sets of paraxial schematic eyes, including 7-year-old eyes, 7-year-old male eyes, 7-year-old female eyes, 14-year-old eyes, 14-year-old male eyes, and 14-year-old female eyes, were developed. Both refraction-dependent and emmetropic eye models were developed, with the former using linear dependence of ocular parameters on refraction.

Results

  • A total of 2059 grade 1 children (boys 58%) and 1536 grade 8 children (boys 49%) were included, with mean age of 7.1 ± 0.4 and 13.7 ± 0.5 years, respectively. Changes in these schematic eyes with aging are increased anterior chamber depth, decreased lens thickness, increased vitreous chamber depth, increased axial length, and decreased lens equivalent power. Male schematic eyes have deeper anterior chamber depth, longer vitreous chamber depth, longer axial length, and lower lens equivalent power than female schematic eyes. Changes in the schematic eyes with positive increase in refraction are decreased anterior chamber depth, increased lens thickness, decreased vitreous chamber depth, decreased axial length, increased corneal radius of curvature, and increased lens power. In general, the emmetropic schematic eyes have biometric parameters similar to those arising from regression fits for the refraction-dependent schematic eyes.

Conclusions

  • The paraxial schematic eyes of Chinese children may be useful for myopia research and for facilitating comparison with other children with the same or different racial backgrounds and living in different places.

Impact and interest:

5 citations in Scopus
5 citations in Web of Science®
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ID Code: 92249
Item Type: Journal Article
Refereed: Yes
DOI: 10.1167/iovs.15-16428
ISSN: 1552-5783
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2015 The Association for Research in Vision and Ophthalmology, Inc.
Deposited On: 22 Jan 2016 03:08
Last Modified: 16 Dec 2016 03:33

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