Fig. 3.

(a) DC and (b) AC images of a fixed sheep ONH. The AC image shows improved visibility and contrast of collagen beams. The ROI indicated with a yellow box shows less pigment absorption in AC image than in DC image. Close-up images, (c) and (d), of the ROIs indicated with red and green doted-box in (b) and (a), respectively. (e) and (f) Close-up images of two ROIs in sclera regions indicated with brown and blue dotted-box in (a) and (b), respectively. (g) Intensity profiles over the same line ROI in both DC and AC images. The red arrow illustrates that the AC image allows detecting more collagen beam than the DC image. (h) Intensity profiles over the line ROIs in both (e) and (f). The AC intensity profile shows more regular intensity variation along a collagen beam.