What happens in your body when you truly relax?
Your nervous system switches from an active to a resting state. This happens when stimuli are low and predictable. Your brain then gets space to process instead of react.
Quiet reading, walking, or listening to music provides little new information. It is precisely this lack of new input that makes relaxation possible. So it's not about sitting still, but about having little to process.
Why does a screen work differently than a book?
Because a screen is designed to hold attention. Even passive use continuously provides new stimuli: changing images, sound, notifications, and choices. This keeps your brain processing.
The distinction between working and relaxing with a screen is smaller for your nervous system than it is for you. Both require selecting, interpreting, and reacting. Even briefly checking a notification requires processing.
Why do you notice this especially in the evening?
Because your body is preparing for rest and expects less light and stimuli. A screen at that moment gives the opposite signal: active light and continuous information.
What that light does exactly to your sleep hormone and at which wavelengths it works most strongly, we explain in blue light and sleep. The practical side, what you should and should not do in that last hour, is in your evening routine and sleep quality.
Can you be tired and still not be able to relax?
Yes. Physical fatigue and mental activity are separate. You can be exhausted and fully "on" at the same time, which explains why being tired does not automatically lead to falling asleep.
Screens reinforce this difference, as they continue to feed the mental side while the physical side is already empty. Relaxation therefore requires not only stopping work, but reducing the number of stimuli.
What helps then?
Four choices that make a difference, and none of them require you to put your phone away. It's about timing, content, and environment.
| Choice | Why it works |
|---|---|
| Plan your screen time | Prevents unconscious endless scrolling |
| Calm content in the evening | News and work demand the heaviest processing |
| Short screen-free moments | Gives your brain space to wind down |
| Softer lighting | Less contrast between screen and room |
Can evening glasses help with this?
An evening lens reduces the part of the light that keeps your body awake. This helps with the light signal, not with mental stimuli. These two are intertwined, and glasses only solve one of them.
If you still use a screen in the evening, our SLEEP glasses can remove the light component. If your mind is still busy afterward, the problem lies in the content you are viewing and not in the light.
This article is intended as an explanation, not as medical advice. For persistent sleep problems, a general practitioner is the appropriate contact.
