Sleep Mask

Portable blackout

A - Strong EvidenceOverall rating for this intervention. See the benefits list below for per-claim ratings.

Overview

A simple eye mask worn during sleep. The cheapest and most portable way to achieve the benefits of a blackout bedroom.

How it works

Physically blocks all light from reaching the eyes, preventing melatonin suppression and light-driven arousal.

Benefits

Darkness: ensures complete darkness regardless of bedroom conditions.
A

Protocol

1Choose a contoured mask that does not press on the eyes.
2Use on flights, in hotels, and when a partner has a different schedule.

Safety Profile

Risk Level

very low

Research Summary

A cheap, portable way to replicate the benefits of a blackout bedroom. Recent trials show measurable next-day cognitive improvement from wearing a mask.

Sources

•Wearing an eye mask during overnight sleep improves episodic learning and alertness(2023)

Last updated: 2026-04-10

Medical Disclaimer

This is a research summary, not medical advice. Body Signals is an independent research digest — it summarises published research for informational purposes and is not a healthcare provider. Supplements like melatonin, valerian, and magnesium can interact with prescription medications — check with your doctor or pharmacist before starting any supplement. Chronic insomnia may indicate an underlying condition (sleep apnoea, thyroid dysfunction, depression) and warrants a medical evaluation.

Need professional guidance?

If sleep issues persist despite lifestyle changes, a sleep specialist or your family doctor can help rule out underlying conditions.

Learn about sleep specialists