The choroid is a vascular layer of the eye that lays <em>between the retina and the sclera.</em> Its main function is to supply oxygen and nutrients to the outer layers of the retina. The layers of the choroid are:
• Haller's layer
• Sattler's layer
• Choriocapillaris
• Bruch's membrane (in contact with the retinal pigment ephitelium)
The choroid is part of the uveal tract, which also contains the iris and the ciliary body.
