Results
A total of 671 records of school-age children were scanned. Amongst them, 474 subjects were excluded from the study due to not having consecutive follow-up visits or not having the inclusion criteria. One hundred and ninety-seven eyes were included in the study according to the inclusion criteria. Out of the subjects, 48.7% (n = 96) were females and 51.3% (n = 101) were males. At the onset age, the cohort aged 9.58 ± 1.56 years. Amongst the prevalence of onset refractive errors of emmetropia, hypermetropia, and myopia were 74.1% (n=146), 14.2% (n=28), and 11.6% (n=23), respectively.
Mean and standard deviations of onset and final biometric measurements by age are given in Table 1 . There were significant differences between onset age and biometric parameters. Accordingly, the increased onset age was caused to significant increase ACD (p = 0.002) and CCT (p = 0.044) whilst it was caused to significant decrease in LT (p = 0.011). The AL progression by onset age was not significant (p = 0.092). In comparisons of the biometric measurements by consecutive follow-up visits, there were significant differences in AL (p = 0.045), ACD (p <0.001) and LT (p = 0.026). In younger onset age, the progression rate of AL and ACD were higher than older onset age whereas, the regression rate LT was lower. In final visits, these significant differences among biometric measurements and final age were lost (p>0.05).