Abstract
Purpose: :
To determine the effect of height, body wieght, and body mass index on refraction, ocular biometric measurements, central corneal thickness, and corneal radius in school children.
Methods: :
A total of 697 school children were enrolled in this study. Height and weight were measured using a standardized protocol, and body mass index was calculated. Cycloplegic refraction, corneal curvature, and interpupillary distance were measured by an autorefractor. Central corneal thickness (CCT) was measured with an ultrasound pachymeter. Ocular biometry, including axial length, anterior chamber depth, lens thickness and vitreous chamber length were measured using A-mode ocular ultrasonography.
Results: :
The means age was 10.3±2.2 years. Height and weight were significantly correlated with age (r=0.896 for height, r=0.796 for weight), anterior chamber depth (r=0.155for height, r=0.104 for weight), lens thickness (r=-0.326 for height, r=-0.250 for weight), vitreous (r=0.314 for height, r=0.245 for weight) and axial length (r=0.318 for height, r=0.233 for weight), refraction (r=-0.193 for height, r=-0.138 for weight), corneal radius (r=0.116 for height, r=0.080 for weight), and interpupillary distance (r=0.500 for height, r=0.488 for weight). Body mass index was significantly associated with lens thickness, vitreous length, axial length, and interpupillary distance. Taller and heavier persons had eyes with longer axial length, deeper anterior and vitreous chambers, and flatter corneas than shorter persons. Heavier and taller persons tended to be more myopic (P < 0.001). Multivariate linear regression models revealed an association between lens thickness, vitreous length, height, and weight and body mass index.