Why Pilots Don't Wear Polarized Sunglasses (FAA Guidance)

The view from a high-altitude cockpit window over a blinding white cloud deck under deep blue sky — More UV than anywhere on the ground, a bright cloud floor, and a panel full of LCDs. The one lens feature that helps everywhere else is the one that gets in the way here.

Pilots do not wear polarized sunglasses because the FAA advises against them, and the FAA advises against them for three specific reasons. A polarizing film can hide the sun-glint off another aircraft's canopy or wing, which is often the first thing that reveals traffic. It can black out LCD instruments and displays at some viewing angles. And it can show rainbow stress patterns in a laminated cockpit windscreen. What pilots wear instead is a non-polarized neutral grey lens with strong UV blocking, at medium darkness, in a frame with thin arms that fit under a headset. The reasoning is worth understanding even if you never fly, because it applies to anyone whose job is reading fixed screens in bright light.

The three reasons

Glint. A distant aircraft is a speck. What makes it visible before you can resolve its shape is the flash of sun off its canopy, its wings or its fuselage. That flash is reflected light off a smooth surface, and reflected light off a smooth surface is polarized. A polarizing film removes exactly that. Pilots scan for traffic by looking for glints; a lens that removes glints removes the cue.

Instruments. Modern cockpits are full of LCD displays: primary flight displays, navigation screens, engine monitors, tablets. LCDs emit polarized light, and through a polarized lens at the wrong angle they dim or go black. Tilting your head to read an altitude tape is not an acceptable workaround at five hundred feet. Our screen post explains the effect.

The windscreen. Aircraft windscreens are laminated and often under stress. A stressed transparent layer between two polarizers, the sky's own partial polarization or a display and your lens, shows interference colours: rainbow patches across the glass. They are distracting and they hide what is behind them.

The FAA's pilot safety brochure sets this out plainly and recommends non-polarized lenses for flying. Most airlines and flight schools follow it.

What pilots wear instead

Feature	Why
Non-polarized	The three reasons above
Neutral grey tint	True colours: cockpit lights, chart colours, the colour of a runway light matter
Strong UV blocking	UV rises roughly 10 percent per 1,000 metres; cloud tops reflect it. At cruising altitude a pilot is in far more UV than anyone on the ground
Medium darkness	Bright cloud deck one moment, dim panel the next. A dark lens loses the panel
Thin, straight temple arms	Fit under a headset without pressing for hours
Large lenses, good coverage	Light from above and from the cloud floor
Non-photochromic	Windscreens block the UV that triggers photochromic darkening; the lens stays light. Our photochromic post explains

The classic aviator frame exists because of the thin-arm and large-lens requirements; the shape came from the job.

What this means for everyone else

Polarized is better for almost everyone on the ground: drivers, anglers, sailors, hikers. Our polarized vs non-polarized post makes that case. The pilot's exception identifies the people for whom it is not: anyone who must read a fixed LCD in bright light and cannot turn it.

Boat skippers with older LCD chartplotters or fish finders.
Machinery and crane operators with cab displays.
Some drivers, if the dashboard goes dark through polarized lenses. Sit in the car and check.

For those people, a non-polarized neutral grey with a real UV claim is the right lens, and it is not one we sell. Every pair on this site is polarized. Our T01 Grey is the neutral tint for everyone whose screens are readable through it, and the check takes ten seconds.

Frequently asked questions

Why are polarized sunglasses bad for pilots?

They can hide the glint off another aircraft, black out LCD instruments at some angles, and show rainbow stress patterns in laminated windscreens. The FAA advises non-polarized lenses for flying.

What sunglasses do pilots wear?

Non-polarized neutral grey lenses with strong UV blocking, medium darkness, in a frame with thin straight arms that fits under a headset. The aviator shape came from those requirements.

Do sunglasses need to be non-polarized for flying?

Per FAA guidance, yes. Airlines and flight schools generally follow it. The reasons are traffic glint, LCD instruments and windscreen stress patterns.

Is UV worse at altitude?

Yes, by roughly 10 percent per 1,000 metres, and cloud tops reflect it back up. Pilots are in more UV than almost anyone on the ground, which is why the UV claim matters so much in a cockpit.

Should boat skippers avoid polarized sunglasses?

Only if their chartplotter or instruments go dark through them. Most modern marine displays are fine. Polarized lenses are otherwise the best thing on the water; check the screens first.

Sources

Federal Aviation Administration. Sunglasses for Pilots: Beyond the Image. Brochure OK-05-0181. www.faa.gov
World Health Organization. Ultraviolet radiation fact sheet: UV and altitude. www.who.int
Hecht E. Optics, 5th ed. Pearson, 2017. Chapter 8: polarization; photoelasticity in laminated glass. www.pearson.com

Measurements on this site are the frame maker's published figures, attributed on every page that prints one. This is general information about sunglasses, not medical advice.

The pairs this is about

Tinvero T01 in black with a polarised grey lens, three-quarter view

T01 Grey$34 Black frameGrey Flat bright sun, driving, everyday

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