Purpose: To determine the
distribution of axial length (AL), vitreous chamber depth (VCD), anterior
chamber depth (ACD), lens thickness (LT), lens power (LP), radius of curvature (CR), and
white-to-white corneal diameter (WTW) in the 14-20 year age range
Methods: In a cross-sectional
study, sampling was done from Aligoodarz high schools using multistage simple
cluster sampling. For all students, visual acuity and non-cycloplegic
refraction tests were performed. Biometric components were measured using
Allegro Biograph (WaveLight AG, Erlangen, Germany).
Results: In this report, data
from 434 cases was used in the analysis of these 222 (51.2%) were females.
Mean and 95% confidence intervals of AL, VCD, ACD, LT, LP, CR, and WTW in the
studied sample were 23.4 mm (23.32 to 23.48), 16.82 mm (16.74 to 16.9), 3.14 mm
(3.12 to 3.16), 3.44 mm (3.42 to 3.46), 22.65 diopter (22.47 to 22.83), 7.74 mm
(7.72 to 7.76), and 12.26 mm (12.22 to 12.3), respectively. In the multiple
regression model, AL, VCD, ACD, CR, and WTW was significantly higher in boys
while mean LT and LP were significantly higher in girls. The distributions of
AL, ACD, LT, and CR were significantly different from normal. The distributions
of AL, LT, and CR were leptokurtic, unlike ACD which had a platykurtic
Conclusion: In this report, we
describe the normal ranges of ocular biometric components in a sample
population of 14-20 year old Iranians. ACD in this study was shorter and WTW
was larger than previous studies and other components were in the midrange.
More studies throughout Iran are needed to verify a shorter ACD and larger WTW.
All components of ocular biometry showed significant inter-gender differences.
Iranian Journal of Ophthalmology 201426(2):72-81 © 2014 by the Iranian Society of Ophthalmology