How to Tell Real Luxury Sunglasses from Fakes: An Optician's Checklist

Every week someone brings a pair of "designer" sunglasses into Opti Plaza and asks us to confirm what they already suspect: that they were sold something fake. It is an easy trap. Counterfeiters have gotten good at copying a silhouette, and a photo on a marketplace listing tells you nothing about weight, hinge action or lens quality. Here is the checklist our opticians actually use on the bench, the same one that stands behind every one of the 1,600 authentic frames we ship worldwide.

Why this is worth checking properly

A fake pair is not just a style problem. Cheap lenses often fail to filter UV correctly even when they look dark, which can be worse for your eyes than wearing no sunglasses at all, since a dark tint dilates the pupil and lets more UV reach the retina. There is also no warranty, no authorized repair path, and no resale value. None of that shows up in a product photo, so the check has to happen with the frame in hand.

The optician's 8 point check

This is the order we work through on every frame that comes across the bench, whether it is a Gucci square frame or a Cartier rimless.

Unpacked in detail, each check is looking for a specific tell:

1. Weight and balance. Genuine acetate is dense and cool to the touch, and genuine metal hinges add real weight at the temple. A fake often feels suspiciously light because the plastic is a cheaper, hollow-feeling resin.
2. Hinge action. Open and close the temples slowly. A real spring hinge resists evenly and closes with a soft, controlled snap. A dry, gritty, or one-sided hinge is a manufacturing shortcut you will feel within a week of wear.
3. Engraving and logo quality. Authentic logos are laser etched or deep stamped, with clean edges and consistent depth letter to letter. Printed logos, uneven kerning, or a font that is close but not quite right are the most common giveaways.
4. Model number match. The code stamped inside the temple has to match, character for character, what is printed on the box label, the hangtag and the authenticity card. If a seller cannot show you all three lining up, walk away.
5. Nose pads and finishing. Check that nose pads are symmetrical and properly seated, that hinge screws sit flush rather than proud, and that there is no glue residue or uneven paint along the frame front.
6. Packaging contents. A genuine pair arrives with a branded hard case, a matching cleaning cloth, and an authenticity or warranty card, not a generic pouch or a printed slip standing in for the real thing.
7. UV filtering test. We test every lens with a UV meter before it goes out. A lens can look almost black and still pass very little protection, or look lightly tinted and block nearly all of it. Tint colour tells you nothing on its own.
8. Price versus authorized retail. Compare the asking price against the brand's own site or an authorized retailer. A legitimate seasonal discount is one thing; a brand new pair at 70 or 80 percent off retail, with no clearance explanation, is not.

What comes in the box, brand by brand

Contents vary slightly by house, but every authentic pair should include a hard case built for that brand and a card confirming the model. Here is what to expect from the houses we carry most, alongside Ray-Ban, Gucci and Cartier.

Brand	Case	Cloth	Card / papers	Notes
Ray-Ban	Branded hard case, logo embossed	Ray-Ban microfiber cloth	Warranty card, sizing details on the temple stamp	Outer box carries the same model code as the temple
Gucci	Rigid case with signature Gucci pattern	Branded cloth pouch or cloth	Authenticity card, sometimes a small booklet	Made by Kering Eyewear, the house's own eyewear manufacturer
Cartier	Structured case, often in a signature red or the frame's own leather tone	Cartier branded cloth	International guarantee booklet and authenticity card	Serial engraving is usually deeper set and more precise than most houses
Balenciaga / Miu Miu	Hard case with house branding	Branded cloth	Authenticity card	Outer box sleeve should match the case and frame colour code exactly

Where fakes cut corners

Counterfeiters copy what a customer can see in a photo and skip everything they cannot. That means the outer shape and colour are often close, while lens optics, UV filtering, hinge metal and the inside-temple engraving are where the shortcuts live. Look through the lens at a straight line, like a door frame, while turning the sunglasses slightly. Genuine lenses keep the line straight; cheap lenses warp or double it, a sign of poor optical grinding. Check the temple tips too: colour that does not quite match the front, or a slightly different acetate texture between the front and the temples, usually means two different production batches were paired together, which authentic houses do not do.

Also worth knowing: legitimate brands rarely, if ever, sell overstock through unofficial marketplace sellers at a fraction of retail. Kering Eyewear, which produces house eyewear including Gucci, and EssilorLuxottica, which produces Ray-Ban, both sell exclusively through their own boutiques and vetted authorized retailers. If a listing cannot tell you where its stock came from, that is itself an answer.

Why authorized-channel sourcing matters

Buying from an authorized retailer is not just about avoiding a fake outright. It is what gives you a working warranty, a manufacturer-backed repair path, and lenses that were actually tested to the UV and impact standards the brand advertises. Every frame at Opti Plaza, across our men's and women's ranges and styles from Aviator to Wayfarer, is sourced this way, which is also why we can hand-check every one of the eight points above before it ships.

When a price is too good to be true

A genuine seasonal sale on last year's colourway can reasonably run 20 to 30 percent off. Beyond that, especially on a current, in-demand model, ask why. Legitimate clearance has a reason: end of season, a discontinued colour, a closing boutique. A brand new flagship style at half price, sold by an account with no verifiable history, almost never has a good one.