Replacing a goggle lens, and when it is cheaper to replace the goggle

What actually goes wrong with a lens

That last row is the one that catches people out. A goggle that leaks or fogs because the foam is flattened is not improved by a fresh lens; you have spent money and still have a goggle that does not seal. The care page covers what shortens foam life.

Why you cannot fix a scratch

Worth stating plainly because the internet is full of suggestions involving toothpaste and polishing compound. A goggle lens is not glass - it is a coated polymer, and the coatings do the work. The outer face carries a hard coat; the inner face carries the anti-fog treatment.

Any abrasive that removes a scratch also removes the coating around it, which leaves a hazy patch that fogs preferentially forever after. You have traded a scratch you could see past for a permanent fog source directly in your field of view. The same logic is why the anti-fog page is emphatic about never wiping a wet inner lens: that treatment is a surface layer, and it comes off on the cloth.

The arithmetic

Four questions, in order, before you spend anything.

• 1. Is the frame still current? Lens availability follows the model. A frame from three seasons ago may have no lenses in stock anywhere, which ends the conversation.
• 2. What does the lens cost against a whole new goggle? On premium goggles a lens is typically a fraction of the goggle. At the budget end, a replacement lens can approach the price of a complete new pair - at which point you are buying an old frame with a new lens.
• 3. Is the foam still good? Press it. If it does not spring back, the goggle is done regardless.
• 4. Do you actually want a different tint? If the answer is yes, this stops being a repair and becomes an upgrade - and it is the best reason on the list to buy a lens.

Frames built for swapping

Two on this site illustrate the two approaches.

OutdoorMaster PRO Magnetic

Published as a magnetic interchangeable-lens design with an anti-fog coating, UV protection and an over-the-glasses cut. The point of a magnetic system is that it takes seconds with gloves on, in a lift line, which is the difference between owning a second lens and actually using it.

Smith Squad ChromaPop

Publishes two lenses included in the box along with a Fog-X anti-fog inner lens and UV protection. That is the other way to solve the problem: rather than buying a spare later at an uncertain price, the second lens arrives with the goggle and the availability question never comes up.

The interchangeable lens roundup compares the field on published lens counts and systems, and the VLT guide covers which second tint is worth owning.

Before you buy a lens: check the warranty

A lens that failed rather than got scratched may not be your cost at all. The two cases worth claiming:

• Delamination. The two layers of a double lens separating, or moisture appearing between them without a soaking, is a manufacturing failure rather than wear.
• Coating failure. An anti-fog layer that clouds or peels in normal use, when you have not wiped the inside wet, is a defect.

Premium brands publish multi-year or limited lifetime warranties on goggles and honor them more often than people expect. Budget brands frequently publish no term at all, which is part of what you are trading away at that price - the cheap-versus-expensive page covers the rest of that trade.

Doing the comparison honestly

Prices move, so rather than printing figures that go stale, here is the comparison to run at the moment you need it.

The third row is the one that surprises people: a new goggle that includes a second lens frequently costs less than a single replacement lens for a premium frame, and you end up with a spare frame as well.

If you are buying a spare tint

Most people own a mid-range lens and need something for the days it does not suit. The useful second lens is almost always the brighter-conditions one or the flat-light one, depending on where you ski.

• If you ski in the trees, in storms or at dusk, the second lens is a high-VLT one that lets more light in. The flat light page covers which are published for it.
• If you ski spring and bluebird days, the second lens is low-VLT for glare.
• If you ski at night, a clear or near-clear lens is the answer, and it is the one tint that genuinely cannot be substituted. Night skiing lenses.

Swapping a lens without ruining it

If you do buy a spare, the swap itself is where people put a thumbprint or a crease into a lens they just paid for.

• Do it indoors, warm, on a clean surface. Cold frames are stiffer and cold hands are clumsier. A hotel bed is a better place than a lift line, whatever the marketing implies.
• Handle the lens by the edges only. Fingerprints on the inner face are on the anti-fog coating, and cleaning them off takes some of it with them.
• Do not flex a cylindrical lens more than the frame asks for. Press-in lenses need a gentle bow; forcing it creases the polymer permanently.
• Check the seal all the way round afterward. A lens seated proudly on one side lets air in and fogs on that side only, which is a confusing symptom to diagnose later.
• Store the spare in its sleeve, in a hard part of the bag. A loose lens in a pack is a scratched lens.

Making the first lens last

• Never wipe the inside when it is wet. Shake the water out and let it air dry. This is the single biggest cause of a prematurely dead lens.
• Use the bag it came in, every time, in the pack. Lenses scratch against zippers and buckles, not on the mountain.
• Do not put them on your forehead - it fogs them and it is how they get dropped.
• Dry them at room temperature with the foam exposed, away from radiators. The drying page.
• Do not share them. Foam compresses to one face, and a second person is a second set of chances to scratch it.

Children, where replacement rarely makes sense

On a child's goggle the frame is usually outgrown before the lens is worn out, and junior frames rarely have spares stocked. Budget accordingly: buy a cheap, well-vented youth goggle, expect to replace the whole thing when the face grows, and keep the old one as the spare that lives in the car.

The short version

Replace the lens when the frame is current, the foam is sound and the lens costs materially less than a new goggle - or when you actually want a different tint. Replace the goggle when the frame is discontinued or the foam is flat. And when you next buy, choose a frame with a published lens system, because that is the decision that makes this question answerable at all.