Why can't I use lenses for Snapchat?

How to Use Snapchat's Virtual Reality Lenses

Using Snapchat's "Lenses" feature, you can make all sorts of silly changes to your snapshots. If you've ever seen a photo of a friend with cute cartoon-like dog ears or swapped faces with someone else, it was a Snapchat lens.

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Snapchat's user interface can be a little confusing. If you're not sure how to use these lenses, we're here to help.

Each lens has a different effect automatically applied to your photos in real time. They move, change or add something to your face. Some lenses exaggerate the size of your nose while others turn you into other animals.

At any given time, there are between roughly ten and 15 different lenses available in Snapchat. New lenses are constantly being added and old ones are being removed and then brought back. Themed lenses are often added on special occasions, and companies can pay Snapchat to use a lens to promote their product.

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Although the lens is one of Snapchat's best features, it hides behind a touch gesture. While almost everything else in the Snapchat user interface is controlled by buttons, there aren't any for lenses.

Open Snapchat to apply a lens to your picture. Many lenses require a face in the photo. Hence, it is easiest to use the front-facing camera.

Before taking a snapshot, tap your face. Snapchat will apply its facial recognition algorithms. Assuming it recognizes your face, Snapchat will bring up the lenses for you to choose from. In low light or at unusual angles, it may take a while for Snapchat to recognize you as a person. It can also make weird mistakes and recognize everyday objects or photos as people.

Swipe through the circular icons to browse all available lenses. Tap a circle to apply it.

Some of the lenses, like the face swap, require two people in the photo. Others also change your voice or add music. There's very little correspondence between lenses and Snapchat keeps adding more that do new things.

When you find the lens you want, take a snapshot as usual. All lenses work either as photos or as videos. Then you can edit your Snap, send it to your friends, or add it to your Story.