Figure 6

OCTA of GA in Non-Neovascular AMD. 71 year old Caucasian man with geographic atrophy (GA) due to non-neovascular age-related macular degeneration using the Angiovue optical coherence tomography angiography (OCTA) software of the RTVue XR Avanti (Optovue, Inc., Fremont, CA). (A) 6 x 6 mm en-face images of the right eye. (A1) En-face structural OCT at the level of the RPE demonstrating GA. The area of GA is circumscribed in yellow, which is overlaid over the images in A2 and A3. (A2) En-face structural OCT at the level of the choriocapillaris demonstrating alteration in a similar area as the GA. (A3) OCT angiogram at the level of the choriocapillaris demonstrating flow impairment in a similar area as the GA. Larger choroidal vessels have been push inward into the area of choriocapillaris alteration so are seen in this 10micrometer slice. Detail is greatly improved over that of the en-face structural OCT. (A4) Corresponding OCT b-scan shows the loss of RPE causing increased intensity below Bruch’s membrane which is characteristic of GA. (B) 3 x 3 mm en-face images of the left eye. (B1) En-face structural OCT at the level of the RPE demonstrating GA. The area of GA is circumscribed in yellow, which is overlaid over the images in B2 and B3. (B2) En-face structural OCT at the level of the choriocapillaris demonstrating alteration in a similar area as the GA. (B3) OCT angiogram at the level of the choriocapillaris demonstrating flow impairment in a similar area as the GA. Larger choroidal vessels have been push inward into the area of choriocapillaris alteration so are seen in this 10micrometer slice. Detail is greatly improved over that of the en-face structural OCT. (B4) Corresponding OCT b-scan shows the loss of RPE causing increased intensity below Bruch’s membrane which is characteristic of GA.