There are few studies reporting the association between stature and ocular biometry as well as cycloplegic refraction in young adults. Our study determined the relationship between stature and ocular biometry as well as cycloplegic refraction in Chinese young adults.
This was a school-based study including university students in Anyang, Henan Province, China. Cycloplegic refraction and corneal curvature (CR) were measured using an autorefractor. Ocular biometric parameters, including axial length (AL), anterior chamber depth (ACD), and lens thickness (LT), were measured using a Lenstar LS900. Height and weight were acquired from an annual standardized physical examination, and body mass index (BMI) was calculated from these measurements.
A total of 5657 (71.0%) subjects were available for analysis. After adjusting for age, gender, parental myopia, time outdoors, near work and weight, a 1 cm taller person could be expected to have more negative refraction as -0.023D, a 0.032 mm increase in AL, a 0.003 mm increase in ACD, a 0.008 mm increase in CR, and a 0.001 increase in axial length-corneal radius (AL/CR) ratio. With regard to weight, a 1 kg heavier person was more likely to have less negative refraction as 0.011 D, deeper ACD by 0.001mm and flatter cornea by 0.002mm. A similar pattern of significant associations was also found in BMI.
Compared to those of less height, young adults of greater height tended to have longer eyes, deeper anterior chambers, flatter corneas, higher AL/CR ratio, and more negative refraction after controlling for potential confounders. In contrast, heavier and higher BMI persons were more hyperopic. The differences in stature may partially explain the variation in refraction and ocular biometric parameters.