Sameera Irfan.
A Stepwise Approach To Dry Eye.
Ophthalmol Update Jan ;13(3):186-8.

Some Basic Facts: Dry Eye is a multi-factorial disease; since there are three layers of the tear film, so three main etiologic causes should be looked for in every patient. ? Whether its reduced tear production with increased tear osmolarity and an inflamed ocular surface. ? Or increased tear evaporation due to deficiency of lipid layer. ? Or poor wetting of ocular surface due to mucin deficiency causing a dry, damaged hydrophobic corneal epithelium even in presence of adequate tear production.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com