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F-actin distribution at different depths near the surface of the normal RNFL. (A) En face image of F-actin stain at 2 μm below the RNFL surface. Diffused strands of F-actin appear between bundles. (B) En face image of the same bundles at 1 μm below the RNFL surface. A network of F-actin appears on the surface of the RNFL.
