What is dry eye?
Normally, the eye constantly bathes itself in tears. The tears lubricate the eye, maintain nutrition, and provide oxygen to eye structures, acts as a refractive component, and helps remove debris from the surface of the eye.
Dry eye is an extremely common condition, which affects most people at some stage in their lives. Dry eye is a disorder of the tear film which occurs due to tear deficiency or excessive tear evaporation; it causes damage to the surface of the eye and is associated with a variety of symptoms reflecting ocular discomfort.
Dry eye symptoms may be a manifestation of a systemic disease, therefore timely detection may lead to recognition of a systemic disorder. Additionally, patients with dry eyes are prone to potentially blinding infections, and also at an increased risk of complications following common procedures such as laser refractive surgery.