Retrobulbar optic neuritis is best described as inflammation of which structure?

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Study for the NBEO Part II TMOD Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

Retrobulbar optic neuritis is best described as inflammation of which structure?

Explanation:
Retrobulbar optic neuritis means inflammation of the optic nerve behind the eyeball. The word retrobulbar specifically points to the posterior portion of the nerve, so you get reduced vision and an afferent pupillary defect even when the optic disc may look normal early on. This contrasts with inflammation at the optic nerve head (papillitis), which would produce visible disc edema. Inflammation of the choroid or retina would involve those tissues directly and present differently on exam and symptoms. So the best description is inflammation of the optic nerve behind the globe.

Retrobulbar optic neuritis means inflammation of the optic nerve behind the eyeball. The word retrobulbar specifically points to the posterior portion of the nerve, so you get reduced vision and an afferent pupillary defect even when the optic disc may look normal early on. This contrasts with inflammation at the optic nerve head (papillitis), which would produce visible disc edema. Inflammation of the choroid or retina would involve those tissues directly and present differently on exam and symptoms. So the best description is inflammation of the optic nerve behind the globe.

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