Ectropion can lead to which corneal finding?

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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

Ectropion can lead to which corneal finding?

Explanation:
Ectropion exposes the lower cornea to the dry tear film and environmental irritants because the lower lid pull lies away from the globe. This chronic exposure most severely affects the inferior corneal surface, leading to epithelial damage that shows up as punctate keratitis there. The inferior cornea is the area most affected by this exposure, so you see inferior SPK. Superior SPK would imply exposure of the upper part of the cornea, which isn’t typical with a lower lid malposition. Corneal edema isn’t the usual pattern for chronic lid malposition, and diffuse conjunctival injection reflects conjunctival irritation rather than a corneal surface problem.

Ectropion exposes the lower cornea to the dry tear film and environmental irritants because the lower lid pull lies away from the globe. This chronic exposure most severely affects the inferior corneal surface, leading to epithelial damage that shows up as punctate keratitis there. The inferior cornea is the area most affected by this exposure, so you see inferior SPK. Superior SPK would imply exposure of the upper part of the cornea, which isn’t typical with a lower lid malposition. Corneal edema isn’t the usual pattern for chronic lid malposition, and diffuse conjunctival injection reflects conjunctival irritation rather than a corneal surface problem.

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