Comparison between Choroidal Thickness in Myopes and Hypermetropes

Abstract

The choroid is a vascular sheet that forms the most posterior part of the middle coat of the eye, extending from optic nerve to the ciliary body. Its function is to provide the blood supply of the retinal pigmented epithelium (RPE) and the outer half of the sensory retina. Moreover, it absorbs excess light energy that penetrates the retina through its pigmented cells preventing light reflection. The choroidal thickness (CT) is 250 µm at the posterior pole, thickest at the macula with 300 µm and thinner anteriorly 100 µm.