The Weiss Ring originates from detachment of the posterior hyaloid from what structure?

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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

The Weiss Ring originates from detachment of the posterior hyaloid from what structure?

Explanation:
Weiss ring appears when the posterior hyaloid cortex detaches from the retina but remains attached around the optic nerve head. As the cortical vitreous peels away during posterior vitreous detachment, most of it clears from the vitreous cavity, leaving a circular rim of condensed hyaloid encircling the optic disc. That peripapillary detachment is what creates the shiny, ring-like structure observed in the vitreous—hence the Weiss ring. The optic disc is the key site related to this appearance; detachments involving the macula, fovea, or iris do not produce this characteristic ring around the nerve head.

Weiss ring appears when the posterior hyaloid cortex detaches from the retina but remains attached around the optic nerve head. As the cortical vitreous peels away during posterior vitreous detachment, most of it clears from the vitreous cavity, leaving a circular rim of condensed hyaloid encircling the optic disc. That peripapillary detachment is what creates the shiny, ring-like structure observed in the vitreous—hence the Weiss ring. The optic disc is the key site related to this appearance; detachments involving the macula, fovea, or iris do not produce this characteristic ring around the nerve head.

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