Anangiotic retinal vasculature is characterized by which of the following?

• A. Vessels extending medially and laterally
• B. Pecten is a vascular structure
• C. No blood vessels in retina
• D. Vessels near the optic nerve head forming a circle

Answer: (C)

Anangiotic retina means the retina has no blood vessels within its layers. In these eyes, retinal tissue is nourished by the choroidal circulation, and in birds, by the vascular pecten oculi diffusing nutrients to the retina rather than through intraretinal vessels. So the defining feature is the absence of retinal blood vessels. The other descriptions imply retinal vasculature exists or involve structures outside the retina (like the pecten’s own vessels), which doesn’t characterize anangiotic retinas.