On OCT imaging, Bruch's membrane is seen as which feature?

On OCT imaging, Bruch's membrane is seen as which feature?

• A. A thick, low-reflectivity area within the choroid
• B. A bright bright spot at the vitreous–retina interface
• C. A dark line within the RPE layer
• D. A thin, highly reflective line immediately posterior to the RPE

Answer: (D)

Bruch's membrane sits right beneath the retinal pigment epithelium as the boundary between the RPE/Bruch's membrane complex and the choroid. On OCT this boundary appears as a very thin, highly reflective line just posterior to the bright RPE band. The RPE is the dominant bright layer, and immediately behind it you see this slim, bright line corresponding to Bruch's membrane, with the choroid underneath showing comparatively less reflectivity. This makes Bruch's membrane recognizable as a thin, bright line in that precise position. In aging or disease (like drusen), this interface can become altered, but the fundamental appearance remains that slim, highly reflective line directly behind the RPE.

Bruch's membrane sits right beneath the retinal pigment epithelium as the boundary between the RPE/Bruch's membrane complex and the choroid. On OCT this boundary appears as a very thin, highly reflective line just posterior to the bright RPE band. The RPE is the dominant bright layer, and immediately behind it you see this slim, bright line corresponding to Bruch's membrane, with the choroid underneath showing comparatively less reflectivity. This makes Bruch's membrane recognizable as a thin, bright line in that precise position. In aging or disease (like drusen), this interface can become altered, but the fundamental appearance remains that slim, highly reflective line directly behind the RPE.