A, In this color fundus photograph, the ONH shows temporal pallor with loss of the nerve fiber layer in the papillomacular bundle. Superiorly and inferiorly along the arcades, rakelike defects (arrows) are seen in the peripapillary retinal nerve fiber layer (pRNFL). Use of the red-free filter on slit-lamp examination can aid in identification of these defects. B, Red-free photograph shows rakelike defects (arrows) along the arcades.