The Index
012

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.

01 /
The clinicians described a specific patient: rested, functional, and certain they were neither, because a number said so. Some arrived with spreadsheets. Some had begun spending longer in bed to lift their scores. The tool meant to reveal the night had started to govern it.
02 /
Sleep used to be something you had and then reported. It is now something you are shown and then dispute. The felt sense arrives second, and loses. A good night is no longer a night you wake up grateful for. It is a night the graph is willing to approve.
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The loop is the cruel part. Worry about the score worsens the sleep, which worsens the score, which feeds the worry. People lie still, trying to earn a better reading from a device that rewards stillness whether or not sleep is underneath it. They are optimizing the measurement. The measurement was supposed to be optimizing 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.

WearablesSleep2026