What are the two main types of Aqueous tear-deficient dry eye?

• A. Sjogren's Syndrome dry eye and Allergic conjunctivitis
• B. Non-Sjogren's Syndrome dry eye and Evaporative dry eye
• C. Sjogren's dry eye and Non-Sjogren's Syndrome Dry Eye
• D. Meibomian gland dysfunction and Allergic conjunctivitis

Answer: (C)

Aqueous tear-deficient dry eye arises from not enough watery tears produced by the lacrimal glands. The two main categories are Sjögren's syndrome–related dry eye, where autoimmune attack reduces lacrimal tear production, and non-Sjögren's syndrome dry eye, which encompasses other causes of lacrimal gland dysfunction or decreased tear production that are not due to Sjögren's. Evaporative dry eye, caused by meibomian gland dysfunction or lipid layer issues, is a separate mechanism and not the same as aqueous tear deficiency. Allergic conjunctivitis is an inflammatory condition and isn’t classified as aqueous-deficient dry eye. So the two primary types of aqueous tear-deficient dry eye are Sjögren's syndrome–related and non-Sjögren's syndrome dry eye.