If you’re paranoid about people seeing things they shouldn’t while you’re working, you might wonder if you need a physical camera cover on your computer lens.

Several prominent public figures have been known to use webcam covers, which are usually plastic sliders or a piece of tape that slips over the lens. Former FBI Director James Comey told NPR he did it. In 2016 photo posted on his Facebook account, Meta CEO Mark Zuckerberg appeared to be using the sticker on his laptop’s camera. Should you do the same?

Here’s what experts think about how useful a webcam cover is indeed there is