Google announced they can predict with 70% accuracy whether someone will go on to have a major cardiac event (i.e. stroke, heart attack) in the next five years by looking at their fundus photo.

How exactly?
By creating pattern-recognizing algorithms, known as neural networks. By analyzing fundus photo data from over 280,000 patients, the neural networks were able to recognize the signs that indicated long-term health dangers.
This kind of retinal artificial intelligence from Google isn’t new. They have been working on it for years to help detect diabetic retinopathy (previous Glance rundown here).
Google said the results are early and years of development are still needed but the work is promising.