Explained · 30 second read

A lens is an app
that runs on the
glasses you wear.

In short: a smart glasses lens is a small app that runs on the glasses and draws pictures, text, or 3D objects into your field of view, so they look like they are in the room with you. Flip the switch to see the same room with the lens off, then on.

Lens off Turn left in 40 m walking route "the meeting starts at four" live translation PINCH TO PICK Place object Resize

Same room either way. The glasses are see through, so the lens only adds a layer on top of what is already in front of you.

Scroll
What it can show you

Four things a lens puts in your view

Almost every lens is built from some mix of these four. Nothing more exotic than that.

Cards you can read Directions, a name, a price, live subtitles of someone speaking another language.
Objects on real surfaces A 3D model that sits on your actual table or floor and stays there as you walk around it.
Buttons you press in the air The glasses see your fingers, so you pinch or tap a floating control with nothing in your hand.
Answers to what you say You ask out loud, the lens replies with text, a voice, or a thing it draws in front of you.

The long version, for designers →

The surprising part

No mouse, no keyboard, no screen to tap

There is nothing to touch. A lens is driven by your hands, your voice, and where you are looking.

Pinch and tap in mid air Bring finger and thumb together to click. Grab a floating object and move it like a real one.
Just say it Speak a request out loud. The lens listens through the microphones built into the frame.
Look at the thing The glasses know which item is in the middle of your view, so looking at it selects it.

New to the whole idea? Start with what is AR, or see what we build for smart glasses.

Not concept art. Shipped lenses.

Four lenses we built

Noodle, a spatial AI workbench lens on Snap Spectacles
Noodle
Spatial AI workbench
 Ice Fishing lens for smart glasses
Ice Fishing
Hand-tracked game
 Timely lens for smart glasses
Timely
Glanceable time tool
 Spatial Mapper lens for smart glasses
Spatial Mapper
Room scanning
Now you know what a lens is

Tell us what you want in the wearer's view.
We'll tell you what it takes to build it.

Smart glasses work What are smart glasses Building for Spectacles What is AR
Start a project

MIT Reality Hack 2026 winner on Snap Spectacles. Replies within 48 hours.

Prefer to read the long version instead? →

Quick answers

What is a smart glasses lens?

A lens is a small app that runs on a pair of smart glasses. When you open it, it draws pictures, text, or 3D objects into your field of view so they look like they are sitting in the room with you.

Is a lens the same thing as an app?

Close enough. A lens does the same job an app does on a phone: it is one experience you open, use, and close. The word lens comes from Snapchat, where camera experiences have been called lenses for years, and it carried over to Snap Spectacles.

What do you actually see when a lens is running?

Content floating in the room in front of you: labels and cards you can read, 3D objects resting on a real table or floor, buttons you can reach out and press. The real room stays fully visible behind all of it.

How do you control a lens with no screen to touch?

With your hands, your voice, and where you look. The glasses track your fingers, so you pinch or tap buttons in mid air. You can also speak to the lens, and it knows which item you are looking at.

Do you need a phone to run a lens?

Not for the experience itself. A lens runs on the glasses. A phone is usually only involved for setup, pairing, and installing new lenses.