Abstract
Dry eye is a multifactorial disease of the ocular surface characterized by a loss of homeostasis of the tear film, and accompanied by ocular symptoms, in which tear film instability and hyperosmolarity ocular surface inflammation and damage, and neurosensory abnormalities play etiological roles. Dry eye is commonly caused by abnormalities in production of tear film. There is so many test to evaluate the dry eye like TBUT (tear break-up time), Epithelial staining, Scheirmer test, Tear function index, Cotton thread test, Tear osmolarity, Impression cytology, Fluorophotometry, Tear fluid protein immunoassays, Tear ferning test. This article will provide an overview of the dry eye and its evaluation and management or the recent challenges in dry eye.
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