Dry Eye


Symptoms associated with dye eye are among the most common of all problems reported to eye doctors. Tears bathe the eye, washing out dust and debris and keeping the eye moist. They also contain enzymes that neutralize the microorganisms that colonize the eye.


Scientifically called the “pre-corneal tear film multi-layer structure”, the tears have a number of specific functions:

  • Provide water to maintain the hydration of the cornea and carry oxygen and nutritional support
  • Carry anti-bacterial and anti-viral cells to protect the exposed structures of the eyeball from infection
  • Carry off debris so it does not damage the sensitive tissue of the eye
  • Provide lubrication between the inside of the lids and the cornea
The tear film is composed of three separate layers, distributed according to weight, heaviest to lightest:

  • Mucus – lies against the eyeball
  • Water – the middle layer
  • Oil – covers the other two

The lacrimal gland, located in the eyelids above the eyeball, is the main producer of these components. In a properly functioning system, the three layers are produced in perfect balance, mixed and distributed across the eyeball with every blink. You are normally unaware of the tear film’s existence.