Alacrima Underlying Cause
Tears protect the surface or the eye and keep the cornea clean, so that light can enter the eye. Tiny glands in the eye produce tears. Tears drain from the eye through a tiny passageway, and into the nose. This passageway is called the nasolacrimal duct.
Dry eyes is caused by decreased tear production, or increased evaporation of tears. Tear production normally decreases with age.
Causes of dry eyes include:
- Sun exposure
- Rheumatoid arthritis
- Sjogren's syndrome
Medications that can cause dry eyes include:
Continue to Alacrima Anatomy
- Montes-Mico R, Alio JL, Charman WN. Dynamic changes in the tear film in dry eyes. Invest Ophthalmol Vis Sci. 2005 May;46(5):1615-9. 
- Smith RE. The tear film complex: pathogenesis and emerging therapies for dry eyes. Cornea. 2005 Jan;24(1):1-7. 
- Whitcher JP. The treatment of dry eyes. Br J Ophthalmol. 2004 May;88(5):603-4. 
- Wright M, Dhillon B. Diagnosis and treatment of dry eyes. Practitioner. 1997 Apr;241(1573):210-2, 214, 216.