New Discoveries About CEI- Computers and Your Eyes

2 Feb

It happens to all “computer dependent” people (which is getting to be just about everybody). You’ve been working at your computer for hours and your eyes gradually begin bothering you. The distraction could cost you money, productivity and, eventually, your visual health. Ophthalmologists are encountering this problem more and more. They have named it “Computer Eye Irritation” or “C.E.I.”, also called “Computer Vision Syndrome” or “C.V.S.”.

    A CEI Quiz

  • Do you use a computer more than two hours a day?
  • Do your eyes sometimes burn or itch?
  • Are your eyes sometimes sensitive to light?
  • Does your vision ever become blurry?
  • Do your eyelids frequently become heavy or tired?
  • Do you get headaches from using the computer?
  • Do your shoulders sometimes feel tight while using the computer?
  • Do you have frequent eye allergies?
  • If you answered “yes” to question #1 and at least two others, you may be experiencing CEI.

Environmental causes of CEI:

In addition to the intense light of the computer monitor, research is discovering that several other common office conditions may result in dry, irritated eyes:

  1. Forced-air heating and cooling.
  2. Synthetic chemicals (plastics, paint, cleaning fluids, etc).
  3. Insulated windows and walls.
  4. Fluorescent lighting.
  5. Stress.
  6. Low indoor humidity.

Dry, irritated eyes.

The environmental stresses just described all result in a slight increase in moisture (water) evaporation from the delicate TEAR FILM covering the eye’s exposed portions. The tear film, though only about five microns (millionths of a meter) thick, is amazingly complex. It consists of:

  • Lipid layer. This topmost layer is comprised of a very thin film of fatty oil that lubricates the eyelid and slows moisture evaporation from the lower layers.
  • Aqueous layer. The middle and thickest layer contains the vast majority of the tear film’s moisture. Obviously, this is where most moisture loss occurs. The layer also contains electrolytes, proteins and bacteria-fighting antibodies. It provides oxygenated water to the cornea.
  • Mucin layer. This bottom layer consists of mucus that glues the tear film to the optical surface.

The most physically irritating results of tear film moisture loss are an over-concentration of electrolyte (salt) and proteins in the aqueous layer. The results are itching, burning, eye-strain and other symptoms. Insufficient oxygen in the aqueous layer’s moisture can also cause discomfort.

Nature’s Tears EyeMist.

The best way to prevent or keep eyes moist and minimize CEI discomfort is to mist your eyes with Nature’s Tears EyeMist whenever discomfort is felt. The unique moisture-mist provides the correct pH balance, mineral content and osmolarity to penetrate to the tear film’s aqueous layer in just the right amount; without flooding. Even if you continue using regular eyedrops, they will become more effective as a moisture sealer (to help decrease moisture film evaporation), if you apply Nature’s Tears EyeMist first. Because Nature’s Tears EyeMist has no dosage limit, you may also apply the mist between eyedrop applications, or as a stand-alone whenever ocular discomfort is felt.

©October 14, 2004 Bio-Logic Aqua Technologies Biomedical Research/Education Division

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