https://techcrunch.com/2021/09/20/facebook-warned-over-very-small-indicator-led-on-smart-glasses-as-eu-dpas-flag-privacy-concerns/

Facebook’s lead privacy regulator in Europe has raised concerns about a pair of ‘smart’ Ray-Ban sunglasses the tech giant is now selling. The glasses include a face-mounted camera which can be used to take pictures and short videos with a verbal cue.

Ireland’s Data Protection Commission (DPC) said Friday that it’s asked the tech giant to demonstrate that an LED indicator light also mounted on the specs — which lights up when the user is taking a video — is an effective way of putting other people on notice that they are being recorded by the wearer.