So far, Apple has pitched its upcoming Vision Pro mixed-reality headset as a tool for working and enjoying various forms of entertainment. But inside the company, employees have also discussed another, more specialized use of the product as a way to diagnose and treat mental health issues, according to people with direct knowledge of the matter.

Such features would tap the device’s array of cameras and sensors to measure a person’s facial expressions, using them to detect depression, anxiety, stress or post-traumatic stress disorder, the people said. The Vision Pro could display images and sounds that might improve the wearer’s emotions, one of the people said. Various rules restrict companies from marketing medical functions in their devices without an OK from regulators. Over time, Apple has received clearance from regulators for health features in the Apple Watch—such as the ability to detect an irregular heart rhythm—which has broadened its appeal beyond a mere fashion accessory.