Fig. 1: Choroidal thickness measurement.
From: Association of sleep disorders with subfoveal choroidal thickness in preschool children
Subfoveal choroidal thickness (red line) was defined as the distance from the outer border of the retinal pigment epithelium to the inner border of the sclera running through the centre of the fovea. A Subfoveal choroidal thickness in a normal child. B Subfoveal choroidal thickness in a child with daytime sleepiness.
