Researchers at the University of Notre Dame recently published a study demonstrating how implanted LEDs, when activated, could trigger a response by the immune system that would cause cancer cells to self-destruct. 

The treatment is still a ways off as additional laboratory and clinical testing will be required, but this use of implanted LEDs could be a solution for cancerous tissue deep inside the body that is otherwise difficult to reach with other forms of treatment. 

It's exciting to see research laboratories bringing different disciplines together – in this case optical engineering with medical expertise – to help solve some of the world's toughest challenges.