Trachoma leads to obstruction of lacrimal gland ducts. This contributes to which type of dry eye?

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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

Trachoma leads to obstruction of lacrimal gland ducts. This contributes to which type of dry eye?

Explanation:
Trachoma can scar and obstruct the ducts that drain the lacrimal gland, reducing the amount of aqueous tear produced. The tear film relies on an adequate aqueous layer to keep the ocular surface moist; when this production is low, you get a deficiency in the aqueous component of tears, leading to aqueous-deficient dry eye. This differs from evaporative dry eye, where tear production may be normal but the tear film evaporates too quickly due to a poor lipid layer. Allergic conjunctivitis and infectious keratitis are not about reduced tear production or the characteristic tear film deficiency described here.

Trachoma can scar and obstruct the ducts that drain the lacrimal gland, reducing the amount of aqueous tear produced. The tear film relies on an adequate aqueous layer to keep the ocular surface moist; when this production is low, you get a deficiency in the aqueous component of tears, leading to aqueous-deficient dry eye. This differs from evaporative dry eye, where tear production may be normal but the tear film evaporates too quickly due to a poor lipid layer. Allergic conjunctivitis and infectious keratitis are not about reduced tear production or the characteristic tear film deficiency described here.

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