Factors effecting the choroidal vascularity index in children with mild to moderate myopia

Abstract

Purpose: To measure the choroidal structural parameters in a population of myopic children and determine the factors effecting the chomidal vascularity index (CVI).Methods: :In total, 200 eyes of 200 children (100 females, 100 males) with a mean age of 11.5 +/- 1.6 years were included in the study. Macular imaging was performed using EDI mode of spectral domain-optical coherence tomography. Binarization of the choroidal area was performed with ImageJ software. Total choroidal area, luminal area (LA), stromal area (SA), and CVI were automatically calculated.Results: The mean choroidal, stromal and luminal areas were measured as 0.952 +/- 0.127 mm(2), 0.626 +/- 0.103 mm(2) and 0.325 +/- 0.076 mm(2), respectively. The mean CVI was 65.81% +/- 6.56. Age and the axial length (AL) of the participants were not found to be associated with the LA and the CVI. (r=-0.078, p=0.274, r=0.017, p=0.808, and r=0,051, p=0.474 and r=-0.128, p=0.071, respectively). There was a statistically significant strong association between the LA and CVI measurements and SE of the participants (r=0.736, p=0.001, and r=-0.605; p=0.001).Conclusion: Age and AL were not associated with the CVI, but SE was significantly associated with the CVI.