The neurocam, developed by Tokyo-based company Neurowear, incorporates sensors that detect electrical activity in the wearer's brain.
Depending on how much activity is detected, the user's interest level in what they're observing is assigned a numerical value from 1 to 100.
Any time that number exceeds 60, a 5-second Graphics Interchange Format (GIF) animated clip is recorded, capturing whatever happens to be in the forward-facing camera's line of sight, 'Gizmag' reported.
Those clips are date- and location-stamped, and stored in a video album for subsequent review.
In its current prototype form, the neurocam uses an integrated smartphone as its brains, storage medium, and camera.
It is hoped that a less gawky production version of the device would incorporate its own custom electronics.