Sunglasses FAQ

A polarized lens has a built-in filter that blocks the horizontal light bouncing off flat surfaces — the glare off water, wet roads and car hoods. You need it for driving, fishing and anything near water. You may not want it for reading screens, cycling with a bike computer, or skiing. See our polarized vs non-polarized guide.

No. UV protection blocks the invisible radiation that damages your eyes; polarization cuts visible glare. They are unrelated, and a lens can have one without the other. Always buy UV400 (or 100% UVA/UVB); polarization is a separate, optional feature.

UV400 means the lens blocks all light up to 400 nanometers — essentially all UVA and UVB. It is the standard you want, and it is unrelated to price: a $15 pair and a $250 pair both hit it. More detail in our UV protection guide.

For UV protection, no — a cheap UV400 pair blocks UV as well as a premium one. What the extra money buys is optical clarity, sport-specific contrast tuning, durability, and a frame that lasts. For eye safety alone, a good budget pair is plenty.

Look at an LCD screen through the lens and rotate the glasses 90 degrees — a polarized lens darkens or blacks out the screen as you turn. Or tilt your head while looking at glare off a car hood; polarized lenses make it shift and fade. Full walkthrough in this guide.

They can. Many screens emit polarized light, so a polarized lens may dim or rainbow a phone, gas pump, dashboard or boat chartplotter — sometimes unreadably at certain angles. Tilting your head usually brings it back. It is the main real-world downside of polarized lenses.

Copper and amber tints are the best all-round choice for the variable light of inshore and freshwater fishing; green and blue mirrors suit bright open water; gray is the most neutral. The tint matters more than the brand — see our lens color for fishing guide.

Usually not. Polarized lenses dim your bike computer's screen and can mask the wet-road sheen that warns of a slick patch — which is why most dedicated cycling lenses are non-polarized. Our cycling lens guide covers the alternatives.

It is debated. Polarized cuts glare well but can flatten the slope cues golfers read on a green, so many golf lenses (like Oakley Prizm Golf) are non-polarized and use contrast tuning instead. Both sides are in our golf lens guide.

The ones that grip and stay put — grip and light weight beat optics for running. The goodr OG is our value pick; see the full running sunglasses roundup.

Buy a pair with a sweat-activated grip coating or rubber nose and temple pads, make sure the frame matches your face width rather than being too wide, and consider a wrap that hugs closer than a flat lifestyle frame. Smooth plastic arms get slicker as you heat up — that is the usual culprit.

Yes — many brands offer prescription polarized lenses, and clip-on or fit-over polarized options exist for wearing over your regular glasses. For prescription needs, work with an eye care professional to get the lens power right; our reviews focus on non-prescription pairs.

You should not wear tinted or dark sunglasses at night — they cut too much light and make driving more dangerous. Some drivers use clear or lightly yellow-tinted anti-glare glasses at night, but these are not sunglasses. Polarized lenses in particular are the wrong choice after dark.

Aim for balance: angular frames suit rounder faces, softer frames suit angular or square ones, and frame width should match face width. A pair that pinches at the temples is too small; one that slides is too big. Our men's and women's roundups go into fit.

Neither is universally better. Glass is optically the clearest and most scratch-resistant but heavier and more likely to shatter if dropped. Polycarbonate is lighter and nearly unbreakable at a small clarity cost. Choose based on whether you value clarity or toughness for your use.

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