The main cause of Computer Vision Syndrome is dry eyes. After working on a computer, there is often dryness in the eyes, accompanied by burning and a feeling of heaviness. In computer users, a reflex tearing may also occur to compensate for the dryness of the eye surface. The primary reason for the formation of dry spots on the eye surface is the decrease in our blinking rate while staring at a screen. Additionally, the following risk factors also play a role in drying out our eyes in front of screens:
Office environment: Air conditioners, paper dust, laser and photocopier toners create dryness and chemical imbalances that disturb the cornea (the front transparent layer) of the eye.
Increased evaporation area on the eye surface: When reading from paper, we typically look downward. Our eyelids cover a significant portion of the eye surface and prevent the evaporation of tears. However, when reading from a screen, we usually look forward, which widens the gap between the eyelids, allowing tears to evaporate over a larger area.
Gender: Women tend to experience more eye dryness than men.
Aging: As we age, our tear production decreases.
Certain rheumatological diseases.
Use of contact lenses: As lenses dry out, they may stick to the upper eyelid during blinking, creating a discomforting friction sensation.
Blepharitis, characterized by dandruff and redness at the base of the eyelashes.
Application of makeup to the inner side of the eyelids.
The adverse effects of screen quality, lighting, and reflection on our eyes. The display quality of a computer depends on three factors: refresh rate, resolution, and dot pitch. The ideal refresh rate is 70 Hz or higher, and higher resolution is preferable. The dot pitch should be 0.28 mm or less.
In Windows, you can adjust the refresh rate and resolution under “Settings” in Display Properties. If you’re using a different operating system, refer to the help menu or the monitor’s user manual. However, dot pitch is fixed and cannot be adjusted.
Environmental lighting (fluorescent, window, desk lamp, etc.) should not be excessive; otherwise, reflections and glare may occur on the screen. If the surrounding lighting cannot be adjusted, anti-glare filters should be used. Screen filters can enhance visual perception and provide some relief to the eyes.
Compared to CRT (cathode ray tube) monitors, LCD (liquid crystal display) monitors are more advantageous for eye health. The development of LCD technology reduces eye strain.
Preventive Measures for Computer Vision Syndrome:
- Keep ambient lighting moderate.
– Maintain a distance of 35-40 cm from the screen.
-Take breaks from the screen at least every 2 hours and look into the distance.
– Have an eye examination annually.
– Use artificial tears (consult your eye doctor).
– Humidify the air in your office.
– Use a screen filter.
– If you wear glasses, ensure they have anti-reflective coating