"Are you alert enough to drive? New smartphone-linked glasses from Japan can tell you that by tracking your gaze and eye movements," says PC World. "Jins Meme glasses from Tokyo eyewear maker Jin can measure fatigue and concentration levels, alerting drivers to dangerous situations. They can measure eye strain caused by looking at computer monitors for a long time, as well as track activities for health purposes. The glasses can also be used to navigate smartphone displays simply by looking left or right." Read more.