Answers

Do Ray-Ban Meta
glasses show when
they're recording?

Yes. A white LED on the outer corner of the right lens lights while the camera is capturing, and it is the signal Meta intends bystanders to rely on.

Whether you will notice it is a separate question, and the honest answer is: often not.

The light

What it does.

Where Front outer corner of the frame, beside the camera lens, on the opposite side from the wearer's eye. It faces the people being photographed rather than the person wearing the glasses.
Photo A brief flash as the shutter fires. If you were not looking at that corner of their face in that second, you missed it.
Video Stays lit for the duration of the recording. This is the case where you have a realistic chance of noticing.
Livestream Also indicated. The same caveat applies — the indicator is doing its job, but only for someone positioned to see it.
Covering it Meta's terms prohibit obscuring the indicator, and the glasses have some protection against it. Researchers have nonetheless shown it can be defeated. We are not going to explain how.
In practice

Why people
still miss it.

None of what follows is a criticism of the indicator's design. It is a small light doing an honest job under conditions that are frequently against it.

It needs line of sight to their face

The light points forward. If the wearer is beside you, behind you, at the other end of a room, or turned even slightly away, there is nothing to see. A camera does not need to be facing you head-on to capture you; the indicator effectively does.

Daylight washes it out

These are sunglasses. They are worn outdoors, in exactly the lighting where a small white LED is least visible.

A photo is over before you look

The flash for a still image lasts about as long as it takes to blink. Video is the detectable case; stills largely are not.

They look like ordinary Ray-Bans

Wayfarers, Headliners, Skylers — the frames are genuine Ray-Ban designs, which is the point of the collaboration. Nothing about them prompts you to check for a light.

The other signal

What the glasses
give off.

Ray-Ban Meta glasses pair with a phone over Bluetooth Low Energy, and maintaining that link means broadcasting. Radio does not care about line of sight the way a small LED does — it passes through a bag, around a corner and behind you.

That broadcast is what LensSentry listens for. It is loudest at specific moments: powering on, leaving the charging case, and pairing. A pair already connected and sitting idle on someone's face can be genuinely quiet, which is the main limitation and one worth knowing before you rely on any detector. There is more detail on how detection works.

Straight answers

The rest of it.

Can I tell if they are recording me specifically?

No. The light tells you the camera is capturing. It cannot tell you what is in frame, and neither can anything else available to you.

Is it legal to wear them here?

Depends entirely on where you are. Many gyms, changing rooms, clinics, courts and theatres prohibit recording devices, and those rules cover camera glasses whether or not staff can spot them. Enforcement is the hard part, which is why venues ask us about this.

Does the wearer see a recording indicator too?

Yes — there are tones and in-app confirmation. That protects against accidental capture, but it is a signal for the wearer, not for you.

What about Oakley Meta, Spectacles, Echo Frames?

All have capture indicators of some kind, and all share the same basic weakness: the indicator only helps a bystander already looking in the right place at the right moment.

Know when one
is nearby.

LensSentry listens for the Bluetooth signals Ray-Ban Meta, Oakley Meta, Snap Spectacles and Echo Frames give off, and says plainly when one may be near — and just as plainly that a detection is not proof anyone is recording.

See how it works