Light therapy glasses may brighten breast cancer recovery
NCT ID NCT04418856
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether wearing special light glasses for 30 minutes each morning could help breast cancer patients feel less tired, sleep better, and think more clearly during treatment. The trial included 260 women with early-stage breast cancer, plus a healthy comparison group. Half received bright white light and half received dim white light, both from a safe, wearable device.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- light glasses (bright white light or dim white light)
- What this could lead to
- If it works, this could offer a simple, drug-free way to reduce common side effects like fatigue and brain fog during breast cancer treatment.
- What could go wrong
- This is a completed trial, but results are not yet widely confirmed. The effect may be small or not apply to all patients. Light therapy is generally safe but may not help everyone.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Reykjavik University
Reykjavik, 102, Iceland
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