What is the ring of glial tissue that separates the surrounding retinal fibers from the optic nerve fibers?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is the ring of glial tissue that separates the surrounding retinal fibers from the optic nerve fibers?

Explanation:
The boundary here is formed by a circular glial structure surrounding the optic disc called the intermediary tissue of Kuhnt. This ring of glial tissue separates the retinal nerve fibers from the axons of the optic nerve as they converge at the head, providing a distinct border between the two fiber populations. It is not part of the lamina cribrosa, which lies deeper in the sclera, nor is it a meningeal layer like pia or dura. So the ring around the optic nerve head made of glial tissue is the intermediary tissue of Kuhnt.

The boundary here is formed by a circular glial structure surrounding the optic disc called the intermediary tissue of Kuhnt. This ring of glial tissue separates the retinal nerve fibers from the axons of the optic nerve as they converge at the head, providing a distinct border between the two fiber populations. It is not part of the lamina cribrosa, which lies deeper in the sclera, nor is it a meningeal layer like pia or dura. So the ring around the optic nerve head made of glial tissue is the intermediary tissue of Kuhnt.

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