To induce lucid dreaming, the aim is to first detect that the mask wearer is in REM sleep. This is commonly done with an infrared eye tracker, which detects the rapid twitching of the eye.
I tried the Superberry Hydrate + Glow Dream Mask from Youth To The People on Amazon after finally ditching my prescription ...
But all that looked set to change after his friends - and other YouTubers - posted videos apparently reacting to Dream without his mask. He then posted a video revealing his face for the first time.