What does the Photoreceptor Ellipsoid Zone represent?

What does the Photoreceptor Ellipsoid Zone represent?

• A. Inner portion densely packed with mitochondria
• B. The photoreceptor outer segment
• C. The retinal nerve fiber layer
• D. The choroidal layer beneath the retina

Answer: (A)

The Photoreceptor Ellipsoid Zone represents the mitochondria-rich inner segment of the photoreceptors. On OCT it appears as a bright, distinct band because the ellipsoid portion is packed with mitochondria, giving high reflectivity. This band sits just above the external limiting membrane and below the outer segments/interdigitation zone, reflecting the inner-segment structure rather than the outer segment, RNFL, or choroid. Preserving this zone indicates healthier photoreceptor inner segments.

The Photoreceptor Ellipsoid Zone represents the mitochondria-rich inner segment of the photoreceptors. On OCT it appears as a bright, distinct band because the ellipsoid portion is packed with mitochondria, giving high reflectivity. This band sits just above the external limiting membrane and below the outer segments/interdigitation zone, reflecting the inner-segment structure rather than the outer segment, RNFL, or choroid. Preserving this zone indicates healthier photoreceptor inner segments.