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Updated: Jun 5, 2025
A Method to Quantify Visual Information Processing in Children Using Eye Tracking
Published on: July 9, 2016
Impact of physical indicators on ocular development in preschool children
Xiangxiang Liu1, Jing Fu1, Lei Li1
1Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Ophthalmology & Visual Sciences Key Laboratory, Capital Medical University, Beijing, China.
Insights
Children’s height and higher body mass index (BMI) are linked to visual development, including visual acuity and ocular measurements. This highlights the importance of monitoring physical growth for early detection of potential vision issues in preschoolers.
Area of Science:
- Pediatric Ophthalmology
- Developmental Biology
- Public Health
Background:
- Early childhood is a critical period for physical and visual development.
- Understanding the interplay between physical growth and ocular maturation is essential for identifying potential health risks.
Purpose of the Study:
- To investigate the associations between anthropometric indicators (height, weight, BMI) and visual parameters (visual acuity, refraction, ocular biometrics) in Chinese preschool children.
- To explore how physical growth influences visual development during early childhood.
Main Methods:
- A cross-sectional study of 1,477 Chinese preschool children (3-6 years old) in Beijing.
- Measurements included height, weight, BMI, visual acuity, refraction (under cycloplegia), and ocular biometrics (axial length, anterior chamber depth, lens thickness, corneal curvature).
- Multivariate linear regression models were used to analyze associations between physical and visual parameters.
Main Results:
- Greater height was associated with poorer visual acuity, more negative refraction, longer axial length, deeper anterior chamber depth, thinner lens, and flatter cornea.
- Higher BMI showed a significant association with visual acuity in girls, and older, more obese children had better visual acuity.
- Height and higher BMI were independently related to visual acuity, axial length, anterior chamber depth, and corneal flattening.
Conclusions:
- Physical growth indicators like height and BMI are independently associated with visual development in preschool children.
- These findings underscore the importance of monitoring both physical and ocular health in early childhood for timely intervention.
Objective:
Understanding the impact of early childhood physical growth on visual development is crucial, as this period marks a critical phase for foundational physical and ocular maturation. The aim of the current study was to investigate the associations between the anthropometric indicators of height, weight, and body mass index (BMI), as well as visual acuity, refraction, and ocular biometrics, in Chinese preschool children.
Methods:
This cross-sectional study consisted of 1,477 Chinese 3- to 6-year-old preschool children from nine kindergartens in Tongzhou District, Beijing. Demographic data, height and weight were measured according to a standard protocol, and BMI was calculated. Refractive error was measured via autorefraction in eyes under cycloplegia. Axial length (AL), anterior chamber depth (ACD), lens thickness, and corneal curvature were measured via an IOL Master. The axial length-corneal radius (AL-CR ratio) was defined as the AL divided by the mean corneal radius of curvature. Multivariate linear regression models were used to explore the cross-sectional associations between physical indicators (height, weight and BMI) and visual acuity and ocular developmental parameters in boys and girls.
Results:
Compared with the children in the fourth quartile for height for a given age and sex, the visual acuity in the fourth quartile was 0.08 less, the refraction was 0.11 D more negative (1.22 D versus 1.33 D), the axial length was 0.62 mm longer, the anterior chamber depth was 0.18 mm deeper, the lens thickness was 0.13 mm thinner, the corneal radius of curvature was 0.1 mm less, and the AL-CR ratio was higher after adjustments were made for age and weight. The association between BMI and visual acuity was statistically significant in girls but not in boys. Older and more obese children had better visual acuity (p < 0.001) after adjustments were made for age.
Conclusion:
Height and higher BMI remained independently related to VA condition, AL and ACD elongation, and corneal flattening in preschool children after controlling for various covariates. These results provide critical insights into pediatric ocular health and emphasize the importance of early detection and intervention in both physical and ocular health in early childhood development.
