Dry Eye - Introduction and Mechanism 1/4

Introduction:

• Dry eye is a condition in which a person doesn't have enough quality tears to lubricate and nourish the eye. 
• Tears are necessary for maintaining the health of the front surface of the eye and for providing clear vision.
• When our Eye blink it spread the tear which provides lubrication. As a result, it reduces risk of infection and remove the debris & keep surface smooth and clear.
• Here are some terms related to dry eye:
• Keratoconjunctivitis sicca (KCS) refers to any eye with some degree of dryness.
•  Xerophthalmia refers to dry eye associated with vitamin -A deficiency.
• Xerosis refers to the extreme ocular dryness and keratinization of cornreal epithelium
• Sjögren syndrome is an autoimmune inflammatory disease of which dry eyes is a feature.

Mechanism Of Disease:

• The four core inter-related mechanisms thought to be responsible for the manifestations of dry eye.
• These are:
• Tear instability, 
• Tear hyper-osmolarity,
• Inflammation and 
• Ocular surface damage. 
• Inflammation in the conjunctiva and accessory glands as well as the ocular surface is present in 80% of patients with KCS and may be both a cause and consequence of dry eye.
• Watch this Video on Youtube Just within 1:30 min:

Watch it on Youtube: https://youtu.be/pb7dSrLE34Q