Field Note · 012
The night, rescored.
On orthosomnia and the tracked sleeper. Summer 2026.
Orthosomnia is the name a group of sleep researchers gave, in a 2017 case series, to a specific kind of patient: someone who comes to the clinic convinced they sleep badly, not because of how they feel in the morning but because of what their tracker reported overnight. The clinicians described people who trusted the wearable over their own rest, and over the clinician. The devices are not medical instruments. They are consumer electronics with a confidence interval the marketing does not print. Nearly a decade later the pattern has only spread, because far more people now sleep beside a device that grades them.
Somewhere a person is lying awake, genuinely well rested, waiting to learn from their phone how the night went. We built a small machine to measure a thing only the body can feel, and then we began to believe the machine instead of the body. The old insomnia was the fear of not sleeping. This one is quieter and stranger. It is the fear of having slept, and having slept wrong.