The choroid is a vascular layer in the eye between the sclera and retina. It consists of several layers:
1. Suprachoroid Lamina (or Suprachoroid Layer)
- The outermost layer of the choroid, adjacent to the sclera.
- Composed of loose connective tissue and melanocytes.
2. Choriocapillaris
- A layer of capillaries that supplies oxygen and nutrients to the outer retina.
- Fenestrated capillaries allow for the exchange of substances.
3. Bruch’s Membrane
- A thin, acellular layer separating the choroid from the retinal pigment epithelium (RPE).
- Composed of collagen and elastin fibers.
These layers work together to provide nourishment to the retina and support its function. The choroid plays a crucial role in maintaining the health and function of the retina.
