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How to Spot a Genuine Essilor Lens

Written by Alvin · Manh Long Optical, 147A Le Duan, Cua Nam, Hanoi · Updated 11 September 2026

Why Essilor gets counterfeited so often

Essilor is a French optical group with over 170 years of history, known for proprietary technologies like Varilux progressive lenses, Crizal Prevencia blue-light coating, Transitions photochromic lenses and Stellest myopia control lenses. Every genuine product goes through strict quality checks and carries proprietary nano coatings for glare, scratch, water and fingerprint resistance.

That reputation, combined with the price, is exactly what makes Essilor a prime target for counterfeiting, copying the packaging and branding while skipping the actual optical engineering entirely.

Check the sealed packaging and authenticity labels

Before a lens is cut and fitted into a frame, you're entitled to ask to see the sleeve it came in. Genuine Essilor packaging is printed sharply on sturdy card, with no smudged ink, and lists the full product line (Crizal, EyeZen, Transitions and others), index, sphere, cylinder and axis, plus a traceable barcode.

Genuine packaging also carries a Vietnamese-language sticker naming the exclusive importer, Essilor Vietnam, and an intact anti-counterfeit seal with no sign of being peeled and reapplied.

The hidden Crizal logo under warm breath or steam

For lens lines that use a Crizal coating (Crizal Rock, Crizal Easy Pro, Crizal Sapphire HR, and others), Essilor embeds a hidden laser-etched logo. Under normal conditions it's completely invisible and doesn't affect vision.

Breathe warm air onto the lens surface, or hold it over steam, and the word "Crizal" or the Essilor mark appears clearly across the lens. As the condensation clears, the logo disappears again just as quickly, a detail that's difficult to fake convincingly.

Check the genuine warranty card and traceability code

A genuine warranty card is roughly credit-card sized, made of sturdy plastic with a sharply printed Essilor logo. It carries full personalised details: customer name, exact prescription, the lens line purchased, the fitting date and the authorised dealer's name.

This card comes with a genuine coating warranty, typically 12 months against natural coating delamination. If the seller can't produce this card and only offers a handwritten note, that's a clear warning sign.

Feel the coating and optical quality

Look closely at the lens surface. A genuine Crizal coating shows a faint green or blue reflection, subtle and easy on the eye, not the harsh glare or flare typical of a counterfeit.

The nano hydrophobic layer makes water bead up and roll off immediately, without leaving a hazy film. A genuine lens keeps the image sharp and true right to the edge, without the waviness or distortion typical of a fake.

Buy from a trusted authorised dealer

A trusted dealer displays an official Essilor authorised-dealer certificate, runs an in-depth eye exam, and openly checks the packaging and demonstrates the hidden Crizal logo in front of you before any lens is cut.

Manh Long Optical is an official distribution partner for genuine Essilor lenses from France. Customers always see the lens sleeve opened in front of them and the full genuine warranty card checked right at the counter.

Common questions

Does nice packaging guarantee a genuine lens?

No, packaging can be counterfeited too. It's only the first check; cross-check it against the hidden Crizal logo and the warranty card.

Can I still breathe-test the Crizal logo after the lens is cut and fitted?

Yes, the logo is etched right into the coating and lasts the life of the lens, breathe warm air on the surface and it appears briefly.

Does a cheaper-than-market Essilor lens mean it's definitely fake?

Not definitely, but it's a reason to ask more questions, request to see the sealed packaging, warranty card and dealer certificate before buying.

Where can I buy genuine Essilor lenses in Hanoi?

From an officially authorised dealer such as Manh Long Optical, 147A Le Duan, Cua Nam, the Essilor dealer certificate is on display in the shop.

What's the fastest check to do right at the counter?

Ask to see the sealed packaging before anything is cut, every genuine lens has this, and it's the quickest one to check.

Does every Essilor lens carry the hidden Crizal logo?

Only lenses with a Crizal coating carry it. A lens without Crizal coating won't show the logo, that's normal; check the packaging and warranty card instead.

I bought lenses elsewhere and I'm not sure they're genuine, what now?

Bring them to Manh Long Optical for a check, we can assess the coating and, if you still have the packaging, confirm whether it passes the checks above.