Tired, strained eyes after screen time

Why screens leave your eyes tired

If your eyes feel heavy, dry or achy after a long day at a computer or phone, you are not alone. Eye doctors call this digital eye strain or computer vision syndrome. A 2022 review describes it as a mix of eye symptoms, such as dryness, itching, a gritty feeling, watering and blurred vision, together with headache, stiff neck and general fatigue. Reported prevalence ranges widely, from about 5 to 65 percent of screen users, and screen time rose sharply for many people during and after the pandemic.

The good news is that screens do not permanently damage your eyes. The American Academy of Ophthalmology (AAO) says the discomfort is similar to what people feel after reading, writing or sewing for long stretches. Two things drive most of it. First, we blink far less while looking at screens, about 5 to 7 times a minute instead of roughly 15, so the eye surface dries out. Second, holding focus at a fixed near distance for hours tires the focusing system. Glare, a screen that is brighter than the room, an outdated glasses prescription and dry indoor air add to the strain.

Lifestyle changes that help most

• Blink on purpose. The AAO suggests a sticky note on your monitor as a reminder to blink fully and often.
• Take regular breaks. Look up from the screen at something in the distance for a little while, many times a day. A common rule of thumb is to look about 20 feet away for 20 seconds every 20 minutes.
• Use artificial tears. Lubricating drops can refresh dry eyes, and a humidifier helps in dry, warm rooms.
• Fix your setup. Sit about 25 inches from the screen, with the screen slightly below eye level. Match screen brightness to the room, raise the contrast and reduce glare with a matte filter if needed.
• Check your glasses. An updated prescription, or computer glasses designed for intermediate distance, can make a large difference. The AAO notes these are not the same as blue light blocking glasses.
• Give contact lenses a rest. Contact lens wearers are more prone to dryness; switching to glasses for long screen sessions can help.

Where supplements fit, cautiously

Supplements are not a first-line answer for screen-related eye strain, but a few ingredients have been studied. In a randomized, placebo-controlled trial in Japanese office workers, 480 mg per day of bilberry extract for 8 weeks eased some objective and subjective measures of eye fatigue after screen work compared with placebo. In a randomized trial in children with at least 4 hours of daily screen time, 4 mg per day of astaxanthin improved eye strain questionnaire scores; the study was funded and partly run by the ingredient maker. Lutein and zeaxanthin raise macular pigment and may modestly improve contrast sensitivity and glare recovery, but evidence that they relieve tired eyes is preliminary.

These results are small and need confirmation. Supplements do not correct an outdated prescription or replace breaks and blinking. Bilberry and ginkgo, which often appear in eye formulas, may interact with blood thinners, so check with a doctor or pharmacist if you take medicines.

Know when it is more than strain

Screen fatigue should ease after rest and overnight sleep. Symptoms that persist, get worse or come with other warning signs may point to a different problem, such as dry eye disease, an uncorrected focusing issue, or a more serious eye condition. Regular eye exams matter, especially after 40, when presbyopia (difficulty focusing up close) commonly begins, and after 65, when yearly exams are recommended.