Which describes the normal rabbit fundus?

Which describes the normal rabbit fundus?

• A. Merangiotic with vessels extending medial and lateral
• B. Round to oval dorsally located optic nerve head with a deep cup
• C. Variable pigment of choroid
• D. Pecten is a vascular structure from choroid with pleated appearance

Answer: (A)

Normal rabbit fundus shows a merangiotic pattern of retinal vasculature, meaning the vessels are confined to the posterior portion of the retina and do not span the entire retina. From the optic nerve, vessels extend toward both the medial (nasal) and lateral (temporal) edges, creating a localized posterior vascular zone rather than a full retinal vascular network. The pecten oculi is a separate, highly vascular, pleated structure arising from the choroid and projecting into the vitreous; it’s a distinctive feature of rabbit eyes but not the description of the retinal vasculature itself. An optic nerve head that is round to oval and dorsally located with a deep cup is not typical for the normal rabbit fundus, and choroidal pigment variation is not a defining feature. So the merangiotic description with vessels extending medially and laterally best captures the normal rabbit fundus.

Normal rabbit fundus shows a merangiotic pattern of retinal vasculature, meaning the vessels are confined to the posterior portion of the retina and do not span the entire retina. From the optic nerve, vessels extend toward both the medial (nasal) and lateral (temporal) edges, creating a localized posterior vascular zone rather than a full retinal vascular network. The pecten oculi is a separate, highly vascular, pleated structure arising from the choroid and projecting into the vitreous; it’s a distinctive feature of rabbit eyes but not the description of the retinal vasculature itself. An optic nerve head that is round to oval and dorsally located with a deep cup is not typical for the normal rabbit fundus, and choroidal pigment variation is not a defining feature. So the merangiotic description with vessels extending medially and laterally best captures the normal rabbit fundus.