Understanding blue light

Blue light and your eyes.

Blue light from screens gets a lot of attention. Here's the evidence-based truth: it's not damaging your retina, but it can affect sleep — and eye strain from screens is real (just not caused by blue light).

What's happening

The real story is about timing.

Sunlight has way more blue light than any screen. Hours of screen time at night, though, signal your brain that it's still daytime — suppressing melatonin and disrupting sleep.

Eye strain from screens is real, but the culprit is reduced blinking (from concentration) and sustained close focus — not the wavelength of the light. That means the fix is breaks, not blue-light filters.

What helps

Here's the plan —
and why it works.

Screens

The 20-20-20 rule

Every 20 minutes, look 20 feet away for 20 seconds. Addresses the actual cause of strain.

Comfort

Artificial tears

Staring reduces blinking. Occasional lubricating drops keep your eyes comfortable.

Night

Warmer colors after dark

Night Shift / Dark mode may help sleep. Not about eye damage — about circadian rhythm.

Setup

Good ergonomics

Monitor arm's length away, slightly below eye level. Adequate room lighting — not screen in the dark.

Common questions

Honest answers to common questions.

Do blue-light glasses prevent eye damage?+

No — because screens don't cause eye damage. Major research bodies (American Academy of Ophthalmology included) have found no evidence that blue light from screens harms the eye. Blue-light glasses don't prevent a condition you don't have.

Do they help with eye strain?+

Research says no. The main causes of computer eye strain are reduced blinking, uncorrected refractive errors, and sustained close focus. Blue-light glasses don't address any of these.

Should I use Night Shift / warmer screen modes?+

For sleep, yes — warmer colors at night may help you fall asleep faster. For eye strain, no effect. Screens at night: warmer. Screens during the day: whatever looks nice.

What actually helps eye strain?+

The 20-20-20 rule (every 20 min, 20 seconds, 20 feet away). Bigger text. Matte screens. Proper glasses prescription. Remembering to blink. Lubricating drops if eyes feel dry.

Is there any blue-light concern?+

For sleep timing, yes — blue light at night suppresses melatonin. Avoid screens 1 hour before bed, or use warmer color modes. For eye health: no concern.

Blue light and your eyes.

The real story is about timing.

Here's the plan —
and why it works.

The 20-20-20 rule

Artificial tears

Warmer colors after dark

Good ergonomics

See us if strain persists

Honest answers to common questions.

We're here when you need us.

Blue light and your eyes.

The real story is about timing.

Here's the plan —and why it works.

The 20-20-20 rule

Artificial tears

Warmer colors after dark

Good ergonomics

See us if strain persists

Honest answers to common questions.

We're here when you need us.

Here's the plan —
and why it works.