Specialty Eye Care
Computer Vision Syndrome
Computer vision syndrome is the cluster of symptoms caused by sustained screen work: tired eyes, headaches, blurred vision at the end of the day, dryness and neck strain. It is caused by reduced blinking and sustained focusing effort.
In short
Reduced blinking and constant focusing effort. Both are addressable.
Screen work is uniquely demanding on the visual system in ways that reading print is not. Blink rate falls by more than half during concentrated screen use, and a large share of the blinks that do happen are incomplete, so the tear film is not properly renewed. Meanwhile the focusing muscles hold a fixed near position for hours without the natural distance breaks that other work provides.
The result is a predictable pattern: eyes that feel fine in the morning and tired by mid afternoon, vision that blurs by the end of the day and clears overnight, headaches that cluster around the temples and brow, and a persistent grittiness.
Most of it is addressable. Some of the fix is behavioural, some of it is environmental, and some of it is optical, because a prescription optimised for distance is not necessarily optimised for a screen at sixty five centimetres.
What to expect
- Working distance measured, not assumed
- Bring the actual distance from your eyes to your screen. A prescription optimised for that distance is meaningfully different from a general one.
- Binocular vision assessed
- Difficulty coordinating the eyes at near is a common and very treatable cause of screen related strain that a basic sight test does not look for.
- Tear film evaluated
- Screen related dryness and screen related focusing strain produce overlapping symptoms and often coexist.
What is included
- Full refraction including working distance assessment
- Binocular vision and focusing assessment
- Tear film evaluation
- Workstation and habit guidance
- Occupational lens recommendation where appropriate
What this does not do
- Glasses alone will not solve it if blink habits and workstation setup are the dominant factors.
- This build makes no claim that blue light filtering lenses protect eye health. The evidence does not support that. What they can help with is comfort and glare, which is a different claim.
Questions and answers
What is the 20 20 20 rule?
Every 20 minutes, look at something 20 feet away for 20 seconds. It relaxes the focusing muscles and prompts a full blink cycle. It is simple, free and genuinely effective, and the difficulty is remembering to do it.
Do blue light glasses work?
They reduce glare and some people find them more comfortable for long screen sessions, which is a real benefit. This practice does not claim they protect your eyes from damage, because the evidence does not support that claim.
Why does my vision blur at the end of the day?
Usually a combination of focusing fatigue and a destabilised tear film. Both recover overnight, which is why mornings feel fine and afternoons do not.
Would a separate pair of computer glasses help?
Often substantially, particularly over forty. A lens optimised for your actual screen distance removes the focusing effort that a general prescription leaves you doing yourself.
Talk to someone about computer vision syndrome
Appointments are scheduled two per hour, so there is time to answer questions properly. Call (480) 706-3937 or request a time online.