Which layer lies between the RPE and the choriocapillaris?

Which layer lies between the RPE and the choriocapillaris?

• A. Bruch's membrane
• B. External limiting membrane
• C. Internal limiting membrane
• D. RPE

Answer: (A)

Bruch's membrane is the thin interface between the retinal pigment epithelium (RPE) and the choroid, specifically the choriocapillaris. The RPE sits on top of Bruch's membrane, which then lies above the vascular choroid. The external limiting membrane and internal limiting membrane are parts of the retinal layers themselves and do not lie at this border. Therefore, Bruch's membrane is the layer between the RPE and the choriocapillaris. On optical coherence tomography, it appears as a very thin, distinct line separating the RPE from the choroidal tissue.

Bruch's membrane is the thin interface between the retinal pigment epithelium (RPE) and the choroid, specifically the choriocapillaris. The RPE sits on top of Bruch's membrane, which then lies above the vascular choroid. The external limiting membrane and internal limiting membrane are parts of the retinal layers themselves and do not lie at this border. Therefore, Bruch's membrane is the layer between the RPE and the choriocapillaris. On optical coherence tomography, it appears as a very thin, distinct line separating the RPE from the choroidal tissue.