Which structure provides structural support to the retina and lies between the choroid and the retinal pigment epithelium?

Which structure provides structural support to the retina and lies between the choroid and the retinal pigment epithelium?

• A. The sclera
• B. Bruch's membrane
• C. The retinal nerve fiber layer
• D. The lens

Answer: (B)

Bruch's membrane is the layer that sits right between the retinal pigment epithelium and the choroid, providing a structural scaffold for the outer retina. It’s a multi-layer membrane that supports the overlying RPE and helps mediate the exchange of nutrients and waste between the retina and the choroidal blood supply, keeping the retina properly aligned and nourished. The other structures don’t fit this location: the sclera is the outer protective coat, the retinal nerve fiber layer is part of the inner retina, and the lens is in front of the iris and vitreous.

Bruch's membrane is the layer that sits right between the retinal pigment epithelium and the choroid, providing a structural scaffold for the outer retina. It’s a multi-layer membrane that supports the overlying RPE and helps mediate the exchange of nutrients and waste between the retina and the choroidal blood supply, keeping the retina properly aligned and nourished. The other structures don’t fit this location: the sclera is the outer protective coat, the retinal nerve fiber layer is part of the inner retina, and the lens is in front of the iris and vitreous.