Guide
Digital eye strain: why screens tire your eyes.
Hours on a screen can leave your eyes dry, tired and blurry. According to the American Academy of Ophthalmology, screens do not permanently damage your eyes, but the discomfort is real.
In short. Long screen time does not permanently damage your eyes, but it can make them dry, achy and blurry, partly because people blink much less while looking at a screen. Blink, look into the distance now and then, and match the screen’s brightness to the room.
Why screens tire your eyes
- You blink less. The American Academy of Ophthalmology says people normally blink about 15 times a minute, but only about 5 to 7 times a minute at a screen. Blinking is how the eye keeps its surface moist.
- A bright screen in a dim room makes your eyes work harder.
- Glare from shiny screens adds to it.
- Contact lenses can make dryness worse during long screen sessions.
What it feels like
Blurred vision, eyes that ache or feel dry, and sometimes tearing or stinging after hours at a screen. If your eyes are often red, blurry or watery, become sensitive to light, or hurt, see an eye doctor.
What helps
- Blink on purpose, especially during long reading.
- Look up and away. Every so often, look at something in the distance for a moment.
- Match the brightness of the screen to the room around it.
- Cut the glare: move the screen away from windows and lamps that reflect in it.
- Keep a computer screen at about arm’s length.
- Get your eyes checked if the discomfort keeps coming back; glasses for screen distance help some people.
One line, then your ear
Lychnos Ring is not an eye product and makes no health claims. Its screen shows a single line, for a glance; most answers are spoken at your ear. It is in development. The wider picture of what research says about phones: is your phone bad for you?
What a Cochrane review found about blue-light glasses: do they work? And the famous 20-20-20 rule, tested: does it work?
Source, read 4 November 2026: American Academy of Ophthalmology, “Computers, Digital Devices, and Eye Strain”, published 27 June 2024. General information, not medical advice.
Questions
Do screens damage your eyes?
According to the American Academy of Ophthalmology, looking at screens for long periods does not permanently damage your eyes, but it can make them uncomfortable.
Do blue light glasses help?
The American Academy of Ophthalmology points out that glasses made for screen distance are not the same thing as blue light blocking glasses. If your eyes trouble you, an eye doctor can check what you need.