A) Fundus image of the rat ONH. B) Collagen fibre orientations (colour map) in the peripapillary sclera about 160 um posterior to the retinal pigment epithelium. Colour scale: −90 to 90 degrees. S, T, I, N: superior, temporal, inferior, nasal. C) Preferred collagen fibre orientations in the peripapillary sclera showing a ring pattern. Adapted from (Baumann et al., 2014) with permission of the Association for Research in Vision and Ophthalmology.