Computer vision Syndrome

Computer vision Syndrome

While health experts advise against spending more than two hours a day in front of a screen, many professions require 5-7 hours of screen work per day, not to mention hobbies such as video games and movies.
Obviously, our bodies are often put to the test, just like our eyes. Computer vision syndrome (SVI) is a collection of eye or sight problems resulting from prolonged computer use, since you are rarely able to quit your sedentary job, a few simple steps can alleviate the symptoms of computer vision Syndrome.

vision syndrome Symptoms

Causes vision Syndrome

Our eyes stay open and work all day; some wonder why it would make a difference to watch one thing rather than another.
In reality, staring at a computer screen places a much greater strain on the visual system than a printed document; the low resolution of the letters, reduced contrast, and reflections on the screen make reading more difficult, and most users are not positioned correctly in front of their screen, which creates a strain on the back and neck.
If you have a minor vision problem that is not corrected, you may find it even more difficult to work in front of a screen, with an increased risk of developing computer vision syndrome.

vision Syndrome Symptoms

Most computer vision syndrome symptoms are temporary and go away after you stop looking at the screen.
However, in some people, symptoms persist long after leaving the computer. The most common symptoms of computer vision syndrome symptoms include:


Blurred vision


Dry eye

Back and neck pain

Vision Syndrome Diagnostic & Tretmant


If you think you have computer vision syndrome, an eye specialist may give you tests, which specifically focus on the proper distance between your eyes and your computer screen. He’ll ask you questions about yourself, perform refraction tests for possible near-sightedness, presbyopia, or astigmatism, and check how your eyes focus, move, and work together.


Your eye specialist will recommend computer glasses specifically designed for screen work, eye therapy for focusing or ocular coordination issues, and changes in eye focus depending on your specific needs.
The ergonomics of your workplace, whether at work or for leisure, good posture is essential: the screen should be 10 to 13 cm below eye level, at a distance of 50 to 70 cm, when seated, the feet should touch the ground.
Also, taking regular breaks is key to avoiding computer vision syndrome symptoms.
When working on a computer screen, be sure to rest your eyesight for 15 minutes every two hours; also, remember the 20-20-20 rule: every 20 minutes,
No article on this blog should be taken as medical advice and cannot replace a healthcare professional’s recommendations. For any specific questions, contact your eye doctor.’

Vision Syndrome Diagnostic

Does stress affect your vision?

Asthenopia, fatigue, or visual stress are vision disorders that have increased considerably due to changes in our society’s lifestyle.
Greater use of electronic screens, sedentary life, and longer working hours can cause this disorder’s onset.
Stress is our body’s reaction to situations of great strain, tension, uncertainty, and anxiety. It has side effects on our health; the stress can cause mental and physical problems and can affect our eyes, and even cause temporary vision loss.

Who is most likely to suffer from visual stress?

People who work long hours, especially in front of screens, those exposed to poorly lit environments, or those who do not wear or use glasses properly are at increased risk of asthenopia.

What are the symptoms for detecting visual stress?

Visual stress can cause:

  • Dry eye:  This is a symptom that can cause discomfort and even pain; this happens when there is a deficit in the flow of tears; therefore, hydration of the eyes or reducing blinking frequency.
  • Itchy eyes: Occur when the eyes’ hydration decreases; it is associated with dry eyes.
  • Tremor of the eyes:  these are myocytes, that is, tics caused by the involuntary movement of the eyelids’ muscles.
  • Inflammation of the eyelids or blepharitis: It is associated with dry eyes and consists of sebaceous residues in the eyelids and eyelashes.
  • The affection of the central part of the retina, the macula: This is known as central serous maculopathy, an inflammation of the macula that causes blurred vision or sudden vision loss.
  • Hypersensitivity to light or photophobia: This mainly occurs when you spend too much time viewing electronic screens.
  • Headaches: Vision problems can cause headaches (Click here for solutions); additionally, visual stress may present with heaviness in the eyelids, blackheads that appear and disappear, inability to concentrate properly, etc.

How can we avoid visual stress?

We leave you with some tips to avoid visual stress:
People who work with computers or screens must take periodic short breaks to rest. When looking at a screen, it is important to keep a sufficient distance to damage your eyes.
It is recommended to place the computer screen 4 inches below the visual axis.

  • The use of indirect light when we use screens will prevent us from straining our eyes.
  • Visual exercises can relax the eyesight, such as looking away to relax the eyes and blinking exercises to hydrate the eyes.
  • It is advisable to hydrate and maintain good eye and eyelids’ good hygiene.
  • After using screens, it is important to do outdoor activities to exercise distance vision.
  • Good health habits such as getting good rest at night and eating a balanced diet will help us avoid visual stress.

What should I do if I suffer from this eye disorder?

Suppose you experience any symptoms that may indicate that you have this eye disorder; in that case, it is important to see an ophthalmologist to examine, assess your case, and establish appropriate treatment, if necessary.

Tips To Reduce Vision Syndrome

Here are some tips to help you reduce the risk of developing machine vision syndrome:

  • Choose colors and contrasts on your computer screen that don’t hurt your eyes and match the lighting in the room you are in.
  • Reduce glare on your screen by dimming room lights if possible, and consider using anti-glare protection on your screen. 
  • You could also position your screen to be perpendicular to windows and other bright light sources. If you have difficulty identifying the glare source, close your screen too dark and adjust it by tilting it until the glare disappears.
  • Ensure that your screen does not have a build-up of fingerprints and dust because they can reduce the screen’s visual clarity.
  • If you work both on the computer and paper, consider purchasing a stand in the form of a vertical tablet installed near the screen so that both are at the same distance.
  • Stick to the 20-20-20 rule. Have a 20-second rest every 20 minutes and see something 20 feet away; this will give your eyes a much-needed respite and help reduce symptoms.
  • Remember to blink your eyes! Did you know that we weblink an average of 12 times per minute, but only five times per minute in front of a computer? It makes the eyes drier. 
  • You can ease the discomfort with eye drops or remember to blink. Consult your optometrist to choose the best drops for your eyes.
  • Request that anti-reflective protection is added to your glasses’ lenses; it is applied at manufacture. 
  • It protects your eyes from bright or flickering light sources, such as fluorescent lights.
  • Ask for lenses designed to reduce the strain of concentration while working at the computer. 

Several lens manufacturers now offer lenses that reduce the strain on the eyes; these lenses are optimized for distance from the computer screen and generally maximize the field of view, which is important for people who work with larger screens or multiple screens.

Since the common effects of vision syndrome are symptoms such as headache, eye pressure, blurred vision, eye irritation, double vision, excessive crying, dry eyes, discomfort, and excessive blinking, you should see your optometry doctor for an eye exam and in the same time to put blue light lenses in front of the screens.