3.Whitish bands composed of medullated nerve fibres radiating out from the optic disc are of no pathological significance and must not be confused with papilloedema.
19.When the comedo closes, skin cells grow over the top of the plug and stop this oxidation from happening, so the whitish color of the sebum shows through.
20.Then you've got this thin little whitish layer in the middle. Those are your warriors, the leukocytes or white blood cells, that defend your body from toxins and foreign microbes.