Neurotrophic keratopathy results in decreased corneal sensitivity due to damage of which cranial nerve?

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Study for the NBEO Ocular Disease Part 1 Test. Use flashcards and multiple choice questions, each with hints and explanations, to prepare for your exam! Get ready for your success!

Multiple Choice

Neurotrophic keratopathy results in decreased corneal sensitivity due to damage of which cranial nerve?

Explanation:
Corneal sensation is carried by the ophthalmic division of the trigeminal nerve (the V1 branch) via the nasociliary nerve. When this sensory pathway is damaged, corneal sensitivity drops, which in turn can lead to neurotrophic keratopathy due to loss of trophic support and impaired epithelial healing. The cornea does not receive its sensory input from the maxillary division (V2) or from the facial nerve (VII) or the oculomotor nerve (III); those nerves are not responsible for corneal sensation. The reflexive blink pathway uses V1 as the afferent limb, so disruption there reduces sensation and the protective blinking response.

Corneal sensation is carried by the ophthalmic division of the trigeminal nerve (the V1 branch) via the nasociliary nerve. When this sensory pathway is damaged, corneal sensitivity drops, which in turn can lead to neurotrophic keratopathy due to loss of trophic support and impaired epithelial healing. The cornea does not receive its sensory input from the maxillary division (V2) or from the facial nerve (VII) or the oculomotor nerve (III); those nerves are not responsible for corneal sensation. The reflexive blink pathway uses V1 as the afferent limb, so disruption there reduces sensation and the protective blinking response.

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