The eyes may be the window to the soul, but they're also a window into heart health thanks to breakthrough health technology that combines artificial intelligence (AI) and machine learning. In a study published in February 2018 in Nature Biomedical Engineering, Google AI researchers and Verily (a health tech subsidiary of Google) teamed up to develop a non-invasive procedure to assess future heart health with retinal imaging techniques. Scientists used AI cameras to observe the blood vessels behind the eyes of more than 250,000 individuals from the United Kingdom and United States. From the collected data, an algorithm predicted the next five years of cardiovascular health for each patient with over 70 percent accuracy. "This discovery is particularly exciting because it suggests we might discover even more ways to diagnose health issues from retinal images," Lily Peng, a product manager for the Google Brain AI research group, said on their blog.