I read about it on lemmy, too. I guess I -- or one of us -- should have cross posted it here from its .world source: https://lemmy.world/post/12081766
Edit to add excerpts:
Results vary on how far away someone would have to be in order to eavesdrop on these different devices. For some, a peeping Tom would have to be less than 1 foot away; for others, they could be as far away as 16 feet.
For consumers, Fu says a plastic lens cover might not be guaranteed to protect you—infrared signals can still get through them––but it is a good first step to battling this kind of cyberthreat.