SUN · FIELD GUIDE
How to Watch a Solar Eclipse Safely
A solar eclipse is unforgettable — but staring at the Sun can blind you. Here's exactly when it's safe to look, and when it absolutely isn't.
A solar eclipse is one of the most moving things you can witness in nature. It's also one of the few sky events that can permanently damage your eyes if you get it wrong. The good news: the rules are simple.
The one rule that matters
Never look at the Sun without certified protection — except during totality.
That single sentence covers almost everything. The Sun is just as dangerous during an eclipse as on any ordinary day; the eclipse simply makes you want to stare at it. Solar retinal burns are painless as they happen, which is exactly why they're dangerous — you won't feel the damage being done.
What "certified" means
You need eclipse glasses or solar viewers that meet the ISO 12312-2 standard. These are thousands of times darker than sunglasses. Ordinary sunglasses — no matter how dark, even several pairs stacked — provide no protection.
Before each use:
- Check for scratches, pinholes or tears. Discard any that are damaged.
- Put them on before you look up, and look away before you take them off.
- Supervise children closely.
The only naked-eye moment
In a total eclipse, there is a brief window — from a few seconds up to several minutes — when the Moon completely covers the Sun's bright disk. This is totality, and only then is it safe (and breathtaking) to look with the naked eye and see the pearly corona.
The instant the first sliver of the Sun reappears, the glasses go back on.
Two big cautions:
- This window exists only inside the narrow path of totality, and only in a total eclipse.
- In an annular ("ring of fire") eclipse, the Moon never fully covers the Sun — a blinding ring is exposed the entire time — so there is never a safe naked-eye moment. Keep filters on throughout.
- In a partial eclipse (which is what most locations outside the central path see), filters stay on the whole time too.
Our eclipse pages tell you, for each country, whether you're in the central path or seeing a partial — which decides whether that magical totality window applies to you at all.
Safe ways to watch without glasses
- Pinhole projection — punch a small hole in card and let the Sun project a crescent image onto a second card. A colander, or even gaps between tree leaves, makes dozens of little eclipse crescents on the ground.
- Telescope or binocular projection — project the Sun's image onto white card behind the eyepiece (never look through).
Optics need their own filter
Binoculars, telescopes and cameras concentrate sunlight intensely. Looking at the Sun through them — even briefly, even with eclipse glasses on your face — can cause instant, serious injury, and can fry a camera sensor. Any optic pointed at the Sun needs a proper solar filter fitted over the front aperture.
Get the safety right and an eclipse becomes what it should be: unforgettable for all the right reasons. Find the next one visible from your country on the eclipses tracker.
Frequently asked questions
Can I look at a solar eclipse with the naked eye?
Only during the brief seconds or minutes of totality in a total eclipse, when the Moon completely covers the Sun's bright disk. At every other time — including all partial phases, and the entire duration of a partial or annular eclipse — you must use certified eye protection. There is no safe naked-eye moment in a partial or annular eclipse.
What kind of glasses do I need?
Eclipse glasses or handheld solar viewers that meet the ISO 12312-2 international safety standard. Ordinary sunglasses — even very dark ones, even stacked — are nowhere near dark enough and offer no protection. Buy from a reputable supplier and inspect them for scratches or holes before use.
Is it safe to look during an annular ('ring of fire') eclipse?
No — never with the naked eye. Because the Moon never fully covers the Sun in an annular eclipse, a blinding sliver of the Sun's surface is exposed the whole time. You must keep certified filters on for the entire event.
Can I watch through my phone or camera?
Pointing an unfiltered camera or phone at the Sun can damage the sensor, and looking through an optical viewfinder at the Sun can injure your eye. Cameras, binoculars and telescopes all need a proper solar filter fitted over the front. Glasses alone are not enough when looking through optics.
SEE IT LIVE
Everything in this guide is on the live Sun tracker.