According to the TFOS DEWS II Definition and Classification report, “Dry eye is a common multifactorial disease of the ocular surface, characterised 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 aetiological roles”¹. It can lead to a variety of symptoms including discomfort, light sensitivity and secondary reflex tearing, as well as anxiety and depression. Symptoms can fluctuate and the condition can affect patients' quality of life significantly².
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