[Choroidal thickness in preschool children].

To estimate the choroidal thickness (CT) in healthy children aged 2-6 years old and its relation to axial length, age and gender. Cross-sectional study. CT was assessed using spectral domain optical coherence tomography (OCT) in 126 children aged 2 to 6 years. CT was measured at nine locations, including the subfovea and 1 mm and 3 mm nasal, temporal, superior and inferior to the fovea. Mean subfoveal choroidal thickness (SFCT) was 331.56±62.03 μm. The choroid was thickest at the subfoveal and 1 mm temporal area, and thinner nasally compared to temporally, superiorly and inferiorly. No statistical significance of SFCT between male and female was noted. Stepwise multiple regression analysis revealed that axial length and age were associated significantly with SFCT (0.00), while there was no detectable effect of sex on SFCT (0.94). Choroidal thickness was negatively correlated to axial length and positively correlated to age in preschool children. The development of the choroid in early childhood offset the effect of the expansion of eyes. Gender played a minor role in the choroidal development in early childhood. .