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Figure 1 | BMC Ophthalmology

Figure 1

From: Clinical and optic coherence tomography findings of focal choroidal excavation in Chinese patients

Figure 1

Spectral-domain optical coherence tomography (SD-OCT) and dimension measurement of a focal choroidal excavation. (A) A small depression slightly nasal to the fovea was present on the OCT image (type 1). The red and black lines show how the depth (red) and the diameter (black) were measured. (B) A shallow and gradual-edged excavation was present at the temporal of the fovea (type 2). The external limiting membrane (ELM), inner segment/outer segment (IS/OS), and cone outer segment tips (COST) follow the contour of the choroidal excavation, but the COST line discontinued at the fovea. The reflection of the choroid at the excavation is stronger than that from around.

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