An Apple patent granted today describes how the front-facing camera, light sensor and proximity sensor found in existing iPhones could be used for health measurements.

The electronic device uses one or more of the camera and the proximity sensor to emit light into a body part of a user touching a surface of the electronic device and one or more of the camera, the ambient light sensor, and the proximity sensor to receive at least part of the emitted light reflected by the body part of the user. The electronic device computes health data of the user based upon sensor data regarding the received light.

It also considers using additional sensors mounted in the same area for further health measurements …

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