Do your eyes feel strained after working with computer or mobile screen for long? it is high time that you should take measures to prevent digital eye strain.
Digital eye strain is of late a common problem affecting all age groups from children to adults across the world.
Computer vision syndrome is commonly referred to as digital eye strain, and it includes a group of symptoms related to eyes and vision resulting from prolonged usage of computer, tablet, and cell phones.
Prolonged exposure to digital gadget screens causes eye discomfort and vision problems and the level of discomfort increases with duration of exposure.
What is the cause of digital eye strain?
Your eyes get fatigued by constant and prolonged exposure to digital screens of devices and gadgets. Increased screen time compels your eyes work harder in unusual ways and predispose many individuals to develop vision-related symptoms.
Furthermore, a few pre- existing vision problems in people, including far sightedness, astigmatism, age related vision changes [ presbyopia ] complicate the computer vision syndrome or worsen it.
During your digital interaction with a mobile or computer screen the work your eye muscles and other cells and tissues do is entirely different from that done while reading a book. Often the letters on the computer or handheld device are not as precise or sharply defined, the level of contrast of the letters to the background is reduced, and the presence of glare and reflections on the screen may make viewing difficult.
Moreover, the sitting posture and distance to screen and exposure time to screen also affect the focus and eyesight.
Thus, the eye focusing and eye movement requirements for digital screen viewing can place additional demands on the visual system.
Uncorrected or under corrected vision problems can be major contributing factors to computer-related eyestrain. It is not uncommon that people who have an eyeglass or contact lens prescription may find it’s not suitable for the specific viewing distances of their computer screen.
Symptoms of digital eye strain
The most common symptoms of digital eyestrain include:
- Eyestrain.
- Headaches.
- Blurred vision.
- Dry eyes.
- Neck and shoulder pain.
There are various factors accounting to these symptoms including:
Poor lighting.
Poor seating posture.
Uncorrected vision problems.
Glare on a digital screen.
Improper viewing distances.
Mostly multiple factors synergistically operate to cause these symptoms in people of all age groups.
How digital eye strain is detected?
There are many tests and processes to find out it.
You may check your vision and other symptoms consulting with an ophthalmologist. Sometimes this problem may need preventive as well as curative treatment.
The common processes done here include
- History taking.
- Visual acuity tests are routinely done to assess the extent to which vision may be affected.
- Assessment to determine the appropriate lens power needed to compensate for any refractive errors (nearsightedness, farsightedness or astigmatism) also is done.
- Testing how the eyes focus, move and work together is important in order to obtain a clear, single image of what is being viewed by the eyes. It must effectively change focus, move and work in unison. This testing will look for problems that keep the eyes from focusing effectively or make it difficult to use both eyes together.
Eye exercise for reducing digital eye strain
- Focusing exercise
Hold your pointer finger a few inches away from your eye.
Focus on your finger.
Slowly move your finger away from your face, holding your focus.
Look away for a moment, into the distance.
Focus on your outstretched finger and slowly bring it back toward your eye.
Look away and focus on something in the distance.
- Near and far vision exercises
Hold your thumb about 10 inches from your face and focus on it for 15 seconds.
Find an object roughly 10 to 20 feet away and focus on it for 15 seconds.
Return your focus to your thumb.
3.Figure eight exercise
This exercise needs to be done from a seated position.
Choose a point on the floor about 10 feet in front of your eyes and focus on it.
Trace an imaginary figure eight with your eyes here.
Do tracing for 30 seconds, then switch directions.
- The 20-20-20 rule
Eyestrain is a problem for many people as they continuously focus eyes on bright screen light .
If you work at a computer for a long period of time, the 20-20-20 rule may help prevent digital eyestrain.
How to apply this 20-20 rules for the well-being of your eyes?
To implement this rule, every 20 minutes, look at something 20 feet away for 20 seconds.
Many of the visual symptoms experienced by users are only temporary and will decline after stopping computer work or use of the digital device. However, some individuals may experience continued reduced eye sight such as blurred distance vision, even after stopping work at a computer.
Can exercise alone help your eye health?
These self-help eye exercise programs may help you improve your eye strain and fatigue. But no scientific data support it. However , experiences show that it helps to reduce eye fatigue.
A ophthalmologist’s help may be needed for prescribing the correct glasses for your nearsightedness, farsightedness, presbyopia, or astigmatism.
Similarly eye exercises do absolutely nothing for glaucoma or macular degeneration — serious diseases that require professional medical help.
Eyeglasses or contact lenses prescribed for general use may not be adequate for computer work. Lenses prescribed to meet the unique visual demands of computer viewing may be needed.
Special lens designs, lens powers or lens tints or coatings may help to maximize visual abilities and comfort.
Better body posture and positioning of computer helps to reduce digital eye strain
Proper body positioning , lighting conditions, chair comfort, location of reference materials, the position of the monitor, and the use of rest breaks play crucial role in reducing digital eye strain.
Location of the computer screen is very important. Most people find it more comfortable to view a computer when the eyes are looking downward. Optimally, the computer screen should be 15 to 20 degrees below eye level (about 4 or 5 inches) as measured from the center of the screen and 20 to 28 inches from the eyes.
Reference materials.
These materials should be ideally placed above the keyboard and below the monitor. Otherwise, a document holder can be used beside the monitor. Here the goal is to position the documents at eye levels, so the head does not need to be repositioned from the document to the screen.
Lighting
Position the computer screen in such a way to avoid glare, particularly from overhead lighting or windows.
Use blinds or drapes on windows and replace the light bulbs in desk lamps with bulbs of lower wattage.
Anti-glare screens also can be used. If there is no way to minimize glare from light sources, consider using a screen glare filter. These filters decrease the amount of light reflected from the screen.
Seating position
Use a comfortably padded a conform to the body. Chair height should be adjusted so the feet rest flat on the floor. Arms should be adjusted to provide support while typing and wrists shouldn’t rest on the keyboard when typing.
Rest breaks.
Give rest to eyes when using the computer for long periods. Resting the eyes for 15 minutes after two hours of continuous computer use. Also, for every 20 minutes of computer viewing, look into the distance for 20 seconds to allow the eyes a chance to refocus.
Blinking.
Blink frequently to reduce dryness of eyes when using a computer.Blinking helps to keep your eye moist.
Regular eye examinations and proper viewing habits can help to prevent or reduce the development of the symptoms associated with CVS.
How to prevent digital eye strain?
- Use appropriate spectacles or glasses which suits your work and vision.
- People may be benefitted from one of the new lens designs made specifically for computer work.
- Minimize discomfort from blue light and glare. Blue light from LED and fluorescent lighting, as well as monitors, tablets and mobile devices, can negatively affect vision over the long term. Special lens tints and coatings can reduce the harmful impact of blue light.
- Minimize glare on the computer screen by using a glare reduction filter, repositioning the screen or using drapes, shades or blinds.
- Keep your computer and mobile screen dirt-free and removing fingerprints on it for better clarity.
- Adjust work area and computer for comfort. When using computers, most people prefer a work surface height of about 26 inches. Desks and tables are usually 29 inches high. Place the computer screen 16 to 30 inches away. The top of the screen should be slightly below horizontal eye level. Tilt the top of the screen away at a 10- to 20-degree angle.
- Use an adjustable document holder. Place reference material at the same distance from eyes as the computer screen and adjacent to it. This may help the eyes to avoid changing focus when looking from one to the other.
In a nut shell, follow healthy habits to improve vision reducing digital eye strain. Consult your ophthalmologist if you have any kind of vision problems and use the right kind of lenses. At the same time discuss with your ophthalmologist about the nature of your work, particularly if you use computer for the entire day. If glasses are worn for distant vision, reading or both, they may not provide the most efficient vision for viewing a computer screen, which is about 20 to 30 inches from the eyes. Tell the doctor about job tasks and measure on-the-job sight distances. If you provide the accurate information to your doctor or optometrist it will help, get the best vision improvement.
Written by dr sanjana p souparnikaaaa
References
- https://www.aoa.org/healthy-eyes/eye-and-vision-conditions/computer-vision-syndrome?sso=y
- https://pmc.ncbi.nlm.nih.gov/articles/PMC9434525/
- https://www.health.harvard.edu/staying-healthy/effective-tips-for-reducing-eye-strain#:~:text=When%20eye%20strain%20is%20caused,when%20looking%20at%20a%20screen.
- https://www.ijceo.org/article-details/14170
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