A couple noticed an unusual 'white glint' in their young son's eye, which prompted a life-changing discovery. Lowri Gallagher was initially not overly concerned by the slight variances in her son ...

It includes image-sensor-based systems like eye-glint-based tracking. This system uses light-emitting devices to create glints on your eyes, which are then analyzed to determine your gaze direction.

A mum and dad spotted a 'strange glint' in their tot's eye - so then used Google and the flash on their phones to reveal he had cancer. Lowri Gallagher admits she was not too concerned when she ...