Characteristics of Refractive Development Parameters and Their Effects on Refractive Status in Children Aged 7～12 Years

Jianmei CHA; Fangbing YAN; Yang ZHANG; Can YU

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Jianmei CHA, Fangbing YAN, Yang ZHANG, Can YU. Characteristics of Refractive Development Parameters and Their Effects on Refractive Status in Children Aged 7～12 Years[J]. Journal of Kunming Medical University.

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Jianmei CHA, Fangbing YAN, Yang ZHANG, Can YU. Characteristics of Refractive Development Parameters and Their Effects on Refractive Status in Children Aged 7～12 Years[J]. Journal of Kunming Medical University.

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Characteristics of Refractive Development Parameters and Their Effects on Refractive Status in Children Aged 7～12 Years

1.
Department of Ophthalmology
2.
Department of Prevention and Health Care，The First Affiliated Hospital of Kunming Medical University，Kunming Yunnan 650032，China

Received Date: 2024-08-05

Abstract

Abstract

Objective To investigate the refractive development parameters of primary school students aged 7 to 12 years in Chuxiong City, Yunnan Province, analyze their relationship with equivalent spherical power （SE）, and evaluate the monitoring role of refractive parameters in myopia. Methods A total of 1463 primary school students aged 7-12 from Beipu Primary School in Chuxiong City, Yunnan Province were selected. Spherical degree （DS）, cylindrical degree （DC）, and equivalent spherical degree（SE） were obtained using a computer autorefractor. Axial length （AL）, corneal curvature （K1, K2）, anterior chamber depth （ACD）, central corneal thickness （CCT）, lens thickness （LT）, and vitreous depth （VD） were measured using a biometer. The corneal curvature radius （CR）, the ratio of axial length to corneal curvature radius （AL/CR）, and lens power （LP） were calculated. Participants were divided into 7～8 years old group （n = 518）, 9～10 years old group （n = 547）, and 11～12 years old group （n = 398） according to age; and categorized into myopic group （n = 647）, emmetropic group （n = 532）, and hyperopic group （n = 284） based on refractive status to analyze the characteristics of refractive parameters and their impact across different age groups and refractive categories. Results （1）SE, DS, LT, and LP decreased with age （P < 0.05）; （2）AL, AL/CR, ACD, and VD increased with age （P < 0.05）; （3）K, CR and CCT showed no significant change with age （P > 0.05）; （4）.In both myopic and hyperopic groups, AL was negatively correlated with SE （r_s = -0.617, r_s = -0.318, both P < 0.05）, AL/CR was negatively correlated with SE （r_s = -0.737, r_s = -0.406, both P < 0.05）, LP was positively correlated with SE （r_s = 0.412, r_s = 0.182, both P < 0.05）, while CR showed no correlation with SE （P > 0.05）. Conclusion The refractive development parameters AL, AL/CR, ACD, and VD increased with age in primary school students aged 7 to 12, while SE, DS, LT, and LP decreased with age, and K, CR, and CCT showed no significant changes. AL/CR and AL can serve as monitoring indicators for myopia, with AL/CR demonstrating a higher correlation with SE than AL.
- Refractive development,
- Refractive error,
- Axial length,
- Myopia,
- AL/CR,
- Children

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References(18)

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