Can staring at screens damage your eyes?

The honest answer

Major eye organisations, including the American Academy of Ophthalmology, state that everyday screen use does not cause permanent damage to healthy eyes. The tired, dry, blurry feeling after a long day on screens is real — but it reflects strain, not the retina being harmed. Laboratory concerns about blue light involve doses far above what phones and laptops emit.

Why your eyes feel tired after screens

People blink far less when concentrating on screens, so the tear film breaks up and eyes feel dry and gritty. Hours of unbroken near focus tire the focusing muscle. Glare, small text, poor posture and an uncorrected glasses prescription all add to the discomfort.

Habits that actually help

Simple habits outperform any lens coating for screen comfort.

• Follow the 20-20-20 rule: every 20 minutes, look at something about 20 feet away for 20 seconds
• Blink fully and consider lubricating drops if your eyes feel dry
• Position the screen slightly below eye level, about an arm's length away
• Match screen brightness to the room and cut glare from windows and lamps
• Keep your glasses or contact lens prescription up to date

When to get your eyes checked

Book an eye test if blur, headaches or dryness persist despite good screen habits — you may need glasses or dry-eye treatment. Sudden vision changes are a different matter: sudden vision loss, a shower of new floaters or flashes, or a shadow across vision need same-day care, not a routine appointment.