So you've got your Meridian glasses in hand. Before you take them outside and get to work, there are a few things worth trying first. Partly because they're fun, partly because they'll show you exactly what's going on with the polarization and why these work the way they do. Think of it as a little unboxing science experiment.
1. The tilt test (this is the big one)
One quick thing to understand first: polarized lenses always cut exactly 50% of randomly scattered ambient light — sunlight, overhead lighting, all the light in your environment that isn't coming from a screen. (If you want to know why, our polarization deep dive gets into the math.)
Screen light is different though, because it's already polarized. How much screen light gets through depends on the angle between the screen's polarization and the lens — anywhere from nearly 100% to 0%. Of course the whole point of these glasses is to get the former, knowing both sides of the equation (MacBook screen + our glasses).
So let's set up a little experiment. Open your MacBook and pull up whatever you normally work on. Take your Meridian glasses and hold them in front of the screen, but don't hold them level — start with them tilted about 45 degrees to one side.
At 45 degrees, about half the screen's light is being blocked. And since ambient light is always being cut by half too, the screen and the world around it are being dimmed by roughly the same amount. It just looks like you're wearing regular sunglasses — everything is uniformly darker, screen included. This is basically what non-polarized sunglasses feel like with a laptop. Nothing special.
Now slowly rotate the glasses back toward level — the way you'd actually wear them. Watch the screen.
As you approach horizontal, the screen starts getting noticeably brighter while everything else around it stays the same. The world doesn't change — ambient light is still getting cut by half — but the screen is getting more and more of its light through the lenses. By the time you're level, your MacBook's display is at nearly full brightness while the rest of the environment is still dimmed around it. The screen kind of pops out at you. It's honestly a really cool effect once you see it starting from 45 degrees.
Note: the screen won't get complete 100% passthrough — the coloring of the lenses adds a touch of uniform dimming — but wayyy better than that 50% baseline.
That's the core of what Meridian does. At the natural wearing angle, the polarization alignment lets nearly 100% of your screen's light through while still cutting ambient light and glare by half. The screen appears brighter relative to everything around it — not because it's actually brighter, but because everything else got dimmer and the screen didn't.
For the full drama, keep going past level and tilt the other direction. The screen dims again, and if you push all the way to 90 degrees it goes nearly black. Then come back to level and it snaps right back. If you read our post on how polarization works, this is the real-world version of that entire article.
2. Try them on your phone
This one is interesting because the result will probably be different from your laptop, and that's actually the point. There's a reason our landing page doesn't say "Polarized for whatever phone you have."
Put your Meridian glasses on and look at your phone in portrait orientation. Depending on your phone model, you might notice the screen is a bit dimmer than you'd expect, or has a slight color shift. Now rotate your phone to landscape. The brightness might change — could get better, could get worse, depends on the phone.
What's happening is that your phone's screen is polarized at a different angle than your MacBook. A lot of Android phones in particular use 45-degree polarization as a compromise for portrait and landscape viewing — and because 45 degrees is only a quarter turn away from both the bright spot and the dark spot, you can actually find both pretty quickly. Try slowly rotating your phone while wearing your Meridians and on a lot of Androids you'll be able to sweep between near-blackout and peak brightness within just a half turn.
Newer iPhones generally won't black out at any angle, but you'll often notice the colors getting subtly warmer or cooler as you rotate — that's the polarization interacting with the display's color layers at different angles. It's a more muted effect but still visible once you're looking for it.
The phone experience will vary from model to model, which is actually a good illustration of why we focused specifically on MacBook Retina displays — it's the screen you're most productive on, and the one where getting alignment right makes the biggest practical difference.
3. The other-screen safari
Once you start noticing polarization you kind of can't stop, and it's honestly entertaining to walk around and see how different screens behave through your Meridian glasses.
Some things to try looking at: the display on a gas pump (these are famously bad with polarized glasses and a lot of people have had the experience of thinking the pump is broken), your car's dashboard or infotainment screen, a TV in a store window, an ATM, the self-checkout screen at the grocery store. Tilt your head side to side while looking at each one and you'll see them brighten and darken at different angles depending on how that particular screen's polarization lines up with the lenses. Some will look totally fine (MacBooks don't have a patent on their polarization angle after all), many will be dimmed just like normal sunglasses, and occasionally you may find one that goes nearly black. Every screen is its own little puzzle.
4. The glare comparison
Find a reflective surface on a sunny day — a car windshield, a puddle, a glass table, even just a glossy countertop with overhead lighting. Look at the glare with your naked eyes first, then put your Meridians on.
The glare should largely dissipate. This is something all polarized sunglasses do — reflected glare generally goes from scattered to polarized, so polarized lenses help cut that down. But it's worth experiencing because it shows that the lenses are doing double duty: cutting glare from the environment around you while simultaneously letting your MacBook's aligned screen light pass through cleanly.
Now for the real payoff — take your laptop outside to that same reflective environment. Glare on the table around you gets heavily blocked, ambient sunlight gets cut by 50%, but your screen stays at full brightness because its polarized output is aligned with the lenses. That contrast between the dimmed world and the bright screen is the whole Meridian experience and it's hard to appreciate until you see it in context like this.
5. The brightness test
This one is practical. Take your MacBook outside on a bright day, sit somewhere you'd normally want to work, and open it up without sunglasses first. Crank the brightness until the screen is comfortably readable. Note where the brightness slider ends up — probably max brightness.
Now put your Meridians on. The ambient light around you drops significantly, but your screen brightness stays the same. You should be able to turn the brightness down and still see the screen clearly, because the relative contrast between your screen and the environment just shifted heavily in the screen's favor.
Depending on the conditions you might be able to drop brightness by 30-40% and still have a readable display. Over the course of a full outdoor work session that's a meaningful difference in battery life — and it's noticeably easier on your eyes since you're not squinting at a screen cranked to maximum output for hours.
That's the tour. Once you've run through these you'll have a pretty solid intuitive feel for what polarization alignment actually does and why it matters for outdoor laptop work. And if you end up filming the tilt test or the glare comparison, tag us — we never get tired of watching MacBook screens go from normally tinted, to magically passing through.
Don't have a pair to play with yet? Check out all our styles at Meridian.