Privacy experts first became concerned in 2014 when Facebook started using facial recognition to help their users label photos.

But now they have much more to worry about. Mark Zuckerberg recently purchased the emotion recognition software FacioMetrics. Possible applications of the software are: augmented reality or animation in the form of filters, stickers and sliders for multimedia (like Snapchat already does). But it could also be possible in the future that Facebook can measure how users react to comments from others, such as political expressions for example, opinion articles or news items. These kinds of new technologies can not only read the facial expressions of users, but can also register when users blink and where they are looking.

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