Photomicrograph of the optic nerve head (staining: PAS); arrows #1 and #2: pia mater of the optic nerve; arrows #3 and #4: peripapillary scleral flange as roof of the orbital cerebrospinal fluid space; black stars: dura mater of the optic nerve.

Abstract

<p>Photomicrograph of the optic nerve head (staining: PAS); arrows #1 and #2: pia mater of the optic nerve; arrows #3 and #4: peripapillary scleral flange as roof of the orbital cerebrospinal fluid space; black stars: dura mater of the optic nerve.</p