Your eyes are not failing. They are drying.
Screens make you blink two thirds less. Most screen fatigue is that simple, and that fixable.
What screens actually do
Staring at a screen drops your blink rate from about 15 times a minute to 5, so the tear film dries and eyes burn, blur and tire by afternoon. It is a surface problem, not damage: screens do not injure eyes, which is also why blue light glasses keep failing in trials.
The routine that fixes most of it
Every 20 minutes, look at something 20 feet away for 20 seconds; distance is the rest position for eye muscles. Blink fully a few times each break. Preservative-free artificial tears as often as needed. Screen slightly below eye level, a step further away, and brightness matched to the room.
When tired eyes need a proper test
Headaches with close work, one eye doing worse, halos around lights, or any sudden change in vision belong with an optometrist, and adults over 40 benefit from routine eye tests anyway; glaucoma steals sight silently. Our guide covers how often to go.
For dry, screen-tired eyes
Preservative-free artificial tears are the first thing eye doctors suggest for dry, burning eyes, used as often as needed. Avoid redness-remover drops for daily use; they rebound.
See preservative-free dropsCommon questions
Do blue light glasses work?
Can screens damage your eyes?
Which eye drops are best for screen strain?
Written by the AskDoc Medical Team. We take no money from any brand; picks are what doctors tell patients to look for.