What is the most common cause of Non-Sjogren's aqueous deficient dry eye?

• A. Age-related dry eye syndrome
• B. Sarcoidosis
• C. Trachoma
• D. LASIK

Answer: (A)

The main idea is that tear production declines with age. In non-Sjögren's aqueous-deficient dry eye, the most common cause is age-related lacrimal gland hyposecretion, leading to reduced aqueous tear production. As the lacrimal glands age, acinar cells function less effectively and tear volume drops, producing a chronic deficiency that isn’t autoimmune in origin.

Other causes can contribute but are far less common overall. Systemic diseases like sarcoidosis can involve the lacrimal glands, but this is not the typical presentation or the most frequent cause. Trachoma leads to conjunctival scarring and tear film instability, which can cause dryness but is not the prevalent driver of aqueous deficiency in general populations. LASIK can cause postoperative dry eye due to nerve disruption and reduced reflex tearing, but that is usually episodic or procedure-related rather than the common, ongoing cause of non-Sjögren's aqueous deficiency.