Pohang University of Science and Technology

If diabetes progresses too far, it can result in a potentially blinding condition known as retinopathy. And while existing treatments are invasive and often painful, there may be new hope in the form of an LED-equipped contact lens.

Scientists from Korea's Pohang University of Science and Technology have created a simple thermometer-like device that can confirm whether or not a patient has actually had a heart attack. It could find use in developing nations or rural locations.