Sunglasses FAQ

100% UV protection — a label reading UV400 or 100% UVA/UVB. The American Academy of Ophthalmology says this, not lens darkness or price, is what actually protects your eyes from UV damage like cataracts. Everything else (polarization, tint, frame) is about comfort and use, not eye safety.

No. UV protection comes from a filter built into the lens, not from how dark it looks. In fact a very dark lens with no UV filter is worse than no sunglasses, because your pupils open wider behind it and let more UV reach the eye. Always check for a UV400 or 100% UVA/UVB label regardless of tint.

They mean the same protective thing. UV400 means the lens blocks all light up to a wavelength of 400 nanometers, which covers 100% of UVA and UVB. If a lens is labeled either way, it blocks the harmful UV. See our UV protection guide for the detail.

If you fish, boat, drive a lot, or are bothered by glare off water, snow or wet roads, yes — polarization removes that reflected glare and reduces eye strain. For general everyday wear it's a nice-to-have rather than essential, and a good non-polarized UV400 lens is cheaper. It's a feature to buy for a reason.

Not automatically — polarization and UV protection are separate features. Most quality polarized lenses also block 100% of UV, but you should still confirm the UV400 or 100% UVA/UVB label. A polarized lens with no UV rating does nothing to protect against UV.

Yes for daytime driving — polarization cuts glare off your hood, wet roads and other windshields. The one catch is that some LCD dashboards and phone screens can look dim or patchy through a polarized lens. Never wear any tinted or polarized lens for night driving; it reduces the light you need to see.

Because the faint sheen on grass helps a golfer read how a putt will break, and polarization removes it. That's why premium golf lenses like Oakley's Prizm Golf are non-polarized on purpose, using a contrast tint instead. See our best sunglasses for golf.

It depends on the light, not on darkness. Gray keeps colors accurate and is the safe all-rounder. Copper, brown, amber and rose tints boost contrast, which helps for golf, driving and flat light. Green sits between. Our lens colors guide has a full tint-by-condition table.

Not for UV protection — a $20 UV400 pair blocks the same UV as a $300 pair. What you pay more for is lens material (optical glass or premium polycarbonate for clarity), polarization quality, frame durability and fit. If clarity on the water or all-day comfort matters, the premium is real; if you just need sun cover, a good budget pair is fine.

Look at an LCD screen through the lens and rotate the glasses about 60–90 degrees; a polarized lens darkens or shifts as you turn it. Or look at glare on a shiny surface and tilt your head — polarized lenses cut and restore the glare as their angle changes.

Angular, squared or wider frames add definition to softer, rounder features — think Wayfarer-style or squared sport frames. Avoid small round frames, which echo the face shape. See our best sunglasses for a round face.

The rule is contrast: pick a frame shape that's the opposite of your face shape. Round faces suit angular frames; angular (square) faces suit round or curved frames; oval faces suit almost anything. Our face-shape guide has picks for each shape.

Yes — fit-over (also called OTG, 'over the glasses') sunglasses are sized to wear over most prescription frames, with side coverage to block edge glare. Measure your glasses against the listed internal dimensions before buying. See our best fit-over sunglasses.

Effectively yes. Polarization removes the surface glare off the water so you can see structure, drop-offs and fish underneath. It's the one category where polarization isn't optional. Our fishing roundup covers glass versus polycarbonate and the best tints.

VLT is Visible Light Transmission — the percentage of visible light a lens lets through. A low VLT (around 10–20%) is a dark lens for bright sun; a high VLT (over 40%) is a lighter lens for overcast or low light. It's a useful way to match a lens to your conditions rather than guessing from how dark it looks.

No, and we say so plainly. We don't run a lab or field-test pairs. Instead we compile and compare the published specs — polarization, UV rating, lens material, tint and fit — cite the eye-health facts to authorities like the AAO and FDA, and reason from there. Our how-we-choose page explains the method in full.

They're pulled live from Amazon and stamped with the date they were checked. If a price is more than a couple of days old it disappears and the button falls back to 'Check price on Amazon,' so you never see a stale number. Always confirm the price on the retailer's site before buying.

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