Computer Vision Syndrome

Computer Vision Syndrome (C.V.S.)

Computer vision syndrome, also known as digital eye strain, encompasses a range of eye and vision-related issues that arise from extended use of computers, tablets, e-readers, and cell phones. Research indicates that a staggering 88% of individuals who regularly use computers in a workplace experience symptoms of computer eye strain. The prevalence of this condition has further escalated due to the increased reliance on electronic devices following the COVID-19 pandemic.

What are the Symptoms of CVS?

Most common ones are:


Overall bodily Fatigue or Tiredness

Burning Eyes

Neck, Shoulder, or Back Pain

Letters on the screen run together

Double Vision

Distance vision is blurry on looking up from the computer.

Driving/Night vision is worse after computer use

‘Haloes’ appear around objects on the screen

Why is Computer Vision Syndrome caused?

The most important reason is that the blink rate (16/min) is reduced to about 1/3 the average rate. This leads to irritation, dryness, excessive tearing and redness.

CVS is caused by our eyes and brain reacting differently to characters on the screen than in a printed book.

Our eyes have little problem focussing on most printed material. Healthy eyes can easily maintain focus on the printed pages.

Characters on a computer screen are brightest at the centre and diminish in intensity towards their edges. This makes it difficult for our eyes to maintain focus and remain fixed on these images.

Instead, our eyes drift out to a point called the ‘resting point of Accommodation’ or R.P.A.

What can I do about it?

Consult our Eye Care doctors

In most cases, standard reading glasses are not accurate enough because viewing a computer is at a distance( 18” -28”) & the reading distance is (16” -21”).
Once diagnosed accurately and working distance assessed, it’s a simple matter to prescribe computer eyeglasses that will allow you to work comfortably and productively.

Computer Lens Design

The computer monitors fall in the intermediate zone of vision.

Typically regular glasses without near vision addition are used for viewing objects at a distance while reading glass help correct near vision.

Bifocal Lens correct, both near and far vision. But these lenses do not produce an intermediate zone viewing area.

Ideally, a progressive lens that corrects far, middle & near distance should be prescribed anti-reflecting coating (A.R.C.).

Will Glare Screens Prevent CVS?

Glare screen filters may help somewhat, but they will not solve your computer vision problems because they only affect glare from the computer screen – not the visual problems related to the constant refocusing of your eyes when working at a computer.

An anti-reflective coating (A.R.C) is also highly recommended on all computer eyeglasses as glare and reflections on the front, and the back of the lenses would interfere with focusing on the screen..

What About The Tints For Computer Lenses?

In an office environment with bright lighting, incorporating a light tint to computer lenses may offer potential benefits. This tint can reduce the amount of light reaching the eyes, potentially providing relief for some individuals. However, it's important to note that tints and filters alone do not address the root cause of computer eye strain.

Does Every Computer User Need Computer Glasses?

More than 70% of computer users need computer spectacles. In fact, according to a study, 25% – 30% of children would benefit from computer eyewear due to the increased incidence of online classes.

What Precautions Should you take while working at a computer screen?

Use Artificial tears drops.

Lower the computer screen so that the centre of the screen is four to eight inches below your eyes. If seated in a draft or near an air vent, try to eliminate air flow past your eyes.

Take frequent breaks: 10 minutes break every hour to reduce eye strain.

Refocus your eyes: Looking away from the computer screen every 10 -15 minutes and focusing on a distant object for 5 -10 seconds. It also lets you blink, which wets your eye.

Use proper lighting: Avoid excessively bright light coming from outside and extremely bright light inside.

Minimize glare.

Adjust the brightness of the computer screen.

Blink more often. While using the computer, people blink less frequently (about 5 times less than usual). This is because tears

What do we offer for CVS?

At Amita Eye Care, we have a Dry Eyes Clinic, specifically dedicated to the care of Computer Vision professionals. A customized, thorough examination of each Computer user conducted and their problem identified and advised on necessary steps. In addition, suggestions on the ergonomics, seating, positioning of the computer, keyboard, and general lighting are given. Treatment at our Dry Eyes Clinic is available at an affordable cost, and we prescribe necessary specific eyewear to the individuals.