This coming bank holiday weekend, the weather in the UK is looking amazing! So, I feel it is time to do a little sunglasses related post. If you’re shopping for sunglasses right now for your weekend get-away, you may have seen the word polarised and wondered what it actually means. It sounds serious and it often costs more but here’s the thing: polarised sunglasses are not the same as UV protection. If you ask me, sometimes they’re absolutely worth it. Other times, you’re paying extra for a feature you may not find useful or might even find annoying.
This is your easy guide to polarised vs non polarised sunglasses, what the labels actually mean, and what to buy for UK sunshine, driving, holidays and just everyday life in general.
What are polarised sunglasses?
Polarised lenses have a special filter that reduces glare. Glare is that harsh, blinding reflection you get bouncing off flat surfaces like:
- Wet roads (my pet hate)
- Car bonnets
- Water (sea, lakes, pools)
- Snow
- Glass buildings
So when people ask what are polarised sunglasses, the simplest answer is: they’re sunglasses designed to cut glare and make your view feel calmer and clearer. Less of a shock to your eye I say.
Polarised vs UV protection, what are the most common confusion?
Let’s clear this up because it’s the biggest myth in sunglasses shopping.
UV400 explained in plain English…
UV400 means the lenses block ultraviolet rays up to 400 nanometres which covers UVA and UVB. In normal-people terms: UV400 = proper UV protection, therefore always look for the UV400 label.
So, do polarised sunglasses block UV? Sometimes yes, sometimes no, it depends on whether they’re also labelled UV400 or 100% UVA/UVB protection.
- Polarisation = glare control
- UV400 = eye protection and ideally you want both.
FYI, a lens tint darkness has nothing to do with UV protection. A darker lens doesn’t automatically mean better protection. In fact, dark lenses without UV protection are risky because your pupils can dilate (go bigger) behind the dark tint, letting in more UV which is then damaging for your eyes. If you see children’s toy sunglasses with a tint, do not let them wear them outside on a sunny day.
If you take one thing from this article, make it this: always check for UV400 / 100% UVA+UVB!
When polarised sunglasses are worth it?
Polarised lenses can feel like a genuine upgrade when you are driving. In my opinion they are the best because on a sunny day, glare from other car windows is not an issue and if it rains and then it is sunny immediately, it doesn’t matter either.
If you drive a lot, polarised lenses can be brilliant because they reduce glare from:
- Wet roads after rain
- Low sun in the morning/evening and hello winter sun in the UK
- Reflections off other cars
- Snowy condition
This is why best sunglasses for driving lists often recommend polarised. Less glare means less squinting, less tension, and a more comfortable drive.
Beach, water and snow
Water glare is intense. Polarised lenses help you see more clearly and comfortably at:
- The beach
- On boats
- Around pools
- Ski trips (snow glare is no joke)
- Sport and outdoor activities
If you are outdoors a lot (walking, cycling, hiking, golf), polarised lenses can make everything look sharper and reduce that washed-out, reflective feeling.
When polarised sunglasses can be annoying?
Polarised isn’t the magic solution for everyone because sometimes, looking at phone screens, sat navs and car displays it can proven to be an issue.
Some screens (especially certain LCD displays) can look:
- Dim
- Patchy
- Rainbow-ish
- blurry
If you rely on a sat nav, dashboard display, or you’re constantly checking your phone, test this before committing to a pair and different polarised lens may work with some screen and not others. This is speaking from experience.
Some cockpit/technical displays
If you’re around specialist displays (for example, certain aviation or technical environments), polarised lenses can interfere with visibility. Hence, pilot are not allowed to wear polarised lens. For most people day-to-day, this won’t matter but it’s worth knowing.
Lens categories (0 – 4): what you should buy?
You’ll often see a lens category label. This is about how dark the tint is, not UV protection.
- Category 2 vs Category 3 for everyday
- Category 2: medium tint good for changeable UK sunshine.
- Category 3: dark tint great for bright sun and holidays (and often the most popular choice).
If you’re buying one pair for summer, Category 3 is usually the sweet spot. Category 4 lenses are very dark and not be as suitable for driving. They’re more for extreme brightness (think glaciers or very intense sun). If you see Category 4, it’s normally a specialist choice.
Prescription sunglasses: should you go polarised?
If you’re considering prescription sunglasses polarised, polarisation can be especially worthwhile because you’ll actually wear them more and you’ll notice the comfort difference.
Polarised prescription sunglasses are often a great fit if you:
- Drive regularly
- Get headaches from bright light
- Spend lots of time outdoors
- Hate squinting and it is giving you a headache
If you mostly wear sunglasses for quick city errands and you’re screen-heavy, you might prefer non-polarised or at least test it out first.
How to spot quality sunglasses without being a lens nerd?
You don’t need to be an optical expert. Just check these:
- UV400 / 100% UVA+UVB clearly stated
- Optical clarity: the view should feel crisp, not wavy or distorted
- Fit: no slipping, no pinching, sits comfortably on the nose and behind the ears
- Build: hinges feel solid, arms aren’t flimsy
- Buy from a reputable optician/retailer none negotiable for prescription wearer
Quick buying guide: 5 questions to answer before you checkout
- Do I need glare reduction for driving or water activities?
- Does it say UV400 / 100% UVA+UVB?
- What lens tint category do I want Category 2, 3 or 4?
- Will I be using screens constantly while wearing them?
- Would I wear these more if they were prescription sunglasses?
Final thought
If you’re buying sunglasses for UK summer and that hot spell coming, my rule is simple: prioritise UV400 first, then decide if you want polarised for glare.
What’s your go-to shape? oversized, cat-eye, aviator, or sporty wrap? And are you team polarised or not? Personally, I am firmly on team polarised for almost all things because they work with my phone and other screens I use. Whenever I go on holiday, I pack one with polarised and one without so I can pick and choose. Category 3 is also my go to and I never ever let my children wear fake/ toy sunglasses especially on a sunny day.
Header image: Stock image from Unsplash by Labinot Dauti