Vascular Organization of the CB

The angioarchiteture of the ciliary process and vasculature is very complex. The vasculature and ciliary processes develop concommittantly, and it would appear that the patterning of the ciliary capillaries dictates the final pattern and organization of the processes. In the human and primate eye, the angioarchitecture is organized into different territories (Figure 4). The first territory includes vessels at the anterior end of the major processes at the Crests of the processes. This region consists of the short anterior arterioles (precapillary) that branch off the MAC to feed the lateral branches. These lateral branches do not feed into the marginal capillaries but drain into isolated venules that run posteriorly without further connections to the rest of the vasculature in the ciliary processes. The second vascular territory includes the marginal vessels in the anterior end and also the center portion and basal regions of the major processes. The third territory comprises the vasculature of the minor processes. The angioarchitecture of the ciliary muscle is organized into a densely packed network of capillaries that are orientated in parallel to the longitudinal axis of the muscle fibers. Within the anterior portion of the pars plana, the vessels interconnect with the vessels located in the valleys between the ciliary processes, and with those from the anterior portion of the ciliary muscle. Posterior to this, the vessels are arranged in parallel rows orientated in the anterior-posterior plane. The vessels are large and flat with few interconnections with neighboring vessels. In the most posterior portion of the pars plana, the vessels are organized into a connecting meshwork similar to that seen in the choriocapillaris.

  • Contact
  • Category: Eye diseases