Distribution of ocular biometric parameters during the eye growth

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Abstract

Purpose

To determine the distribution of ocular biometric parameters and their correlation with age and gender during the eye growth.

Methods

In a cross-sectional study, a multi-stage stratified cluster sampling was used to sample the study population from Dezful schools, a city in the southwest of Iran. Participants were selected from the all school grades and both genders. Examinations were performed after obtaining consent from the subjects's parent. LENSTAR/BioGraph (WaveLight AG, Erlangen, Germany) was used for ocular biometry.

Results

Of 864 selected subjects, 683 participated in the study (response rate:79.1%); 377 participants (55.2%) were males. Mean age of the subjects was 12±3.4 years (range: 6.0-18 years). Mean and 95% confidence interval(CI) of axial length (AL),anterior chamber depth (ACD), lens thickness (LT),central corneal thickness (CCT),corneal diameter (CD), and pupilary diameter(PD) were 23.13 mm (22.93-23.33), 3.01 mm (2.96-3.06), 3.58 mm (3.55-3.61), 549.33 mic (546.59-552.07), 12.34 mm (12.31-12.38), and 4.97 (4.91-5.03), respectively. Ocular biometric parameters were normally distributed. Distribution of LT and CD were leptokurtic and the distribution of the PD was platykurtic. The mean of AL, ACD, CD and CR were significantly higher in boys and the mean of LT was significantly higher in girls. Axial length and ACD increased and the LT decreased significantly with age. Axial length and CR had the highest correlation (r=0.669) and ACD had the strongest correlation with the

Conclusion

The results of this study indicated that AL and ACD were intermediate and shorter respectively. Corneal diameter was bigger in comparison with the other studies. The majority of the changes were observed in AL and LT.

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