Can a simple photo of your face reveal how ill you are?

An AI tool may be able to help doctors judge how ill a patient is using a single photograph of their face, say US researchers.

Trained on millions of healthy faces, and 35,000 photos of cancer patients, the tool can make estimates on survival by looking closely at features near the eyes, the scientists say.

While it's a long way from being suitable for use in hospitals, the researchers say their goal is to help doctors recommend the right treatments for their patients.