Which description matches merangiotic retinal vasculature?

• A. No blood vessels in retina
• B. Vessels in broad horizontal bands
• C. Short vessels directly adjacent to the optic nerve head
• D. Pecten is a vascular structure from the choroid

Answer: (B)

Merangiotic retina means the retinal blood vessels are confined to limited stripes rather than spreading across the entire retina. In practice, you see vessels arranged in broad horizontal bands with large, vascular-free areas between them. That pattern fits the description of vessels in broad horizontal bands.

Understanding this helps: a retina with no retinal vessels at all would be avascular; vessels only near the optic nerve head describe a localized peripapillary pattern, not a banded distribution; and the pecten is a choroidal vascular structure seen in birds, not part of the retinal vascular pattern in mammals.