Smart glass that informs you of the break time in lens color

Blueberry is a smart glass that tells you when you need a break. A sensor is built into the frame to measure brain activity and heart rate in real time, and through this, it changes the color of the lens by evaluating the mental load and burden caused by work.

The brain activity sensor consists of an infrared emitter and a detector located in the left frame, and measures blood and oxygen in brain tissue through functional near-infrared spectroscopy fNIRS. It is to evaluate brain activity. In addition, it is linked with a smartphone to record the related status so that changes can be reviewed every day.

The battery is rechargeable and can be used for up to 12 hours with 1 hour charge. It costs 195 Canadian dollars. This product was raised through crowdfunding site Kickstarter. More information on the product can be found here .