Eye Masks, Earplugs, and Sleep: Strongest in Noisy Clinical Environments

Bottom line: Eye masks and earplugs have a real sleep evidence base, but most of it comes from intensive-care and hospital environments, where light and noise are unusually disruptive. Eye masks and combined eye-mask + earplug interventions repeatedly improve subjective sleep quality; earplugs alone look less consistent. The right conclusion is not “everyone needs both every night.” It is that blocking a real environmental disruptor can help when that disruptor is actually present.

Some sleep interventions are complicated because they change neurochemistry, circadian timing, or medication exposure.

Eye masks and earplugs are much simpler: reduce unwanted light and noise.

That simplicity is appealing—but it also means the environment determines how much room there is for benefit.

The newest 2026 review keeps the signal positive but cautious

A 2026 systematic review examined randomized clinical trials of eye masks and earplugs in adult intensive-care patients.[1]

Eight trials with 611 participants met the review criteria. Across the studies, eye masks and earplugs generally improved subjective sleep quality, while delirium findings were more heterogeneous and inconclusive.[1]

The review also emphasized practical limitations such as comfort, tolerance, duration of use, and variation between studies.[1]

That is a good modern summary: the intervention is promising and low complexity, but not perfectly standardized.

Earlier meta-analysis found the strongest signal for eye masks and combinations

A 2021 systematic review/meta-analysis pooled 13 studies with 797 ICU patients.[2]

Across all interventions, sleep quality improved significantly. But the subgroup results were revealing:

• earplugs alone: no significant sleep-quality effect;
• eye masks alone: significant improvement; and
• eye masks + earplugs: the largest pooled effect.[2]

That does not prove earplugs are useless. It suggests that the isolated earplug evidence was less robust than the evidence for darkness or combined sensory reduction.

Another large review found both subjective and some objective signals

A separate 2021 systematic review/meta-analysis included 2,687 participants from 35 studies, with 21 studies entering meta-analysis.[3]

Eye-mask and/or earplug interventions improved several subjective sleep-quality scales. In the subset of studies using polysomnography, the review also reported improvements in total sleep time, sleep efficiency, REM time, awakenings, and arousal index.[3]

That sounds strong, but the intervention category was broad and the underlying studies varied substantially.

The correct interpretation is that objective signals exist—not that every sleep mask reliably increases REM sleep in a home bedroom.

Network meta-analyses repeatedly rank eye masks highly in ICUs

A 2022 network meta-analysis of randomized ICU trials compared several non-drug sleep interventions.[4]

Eye masks alone and combinations involving music, earplugs, and eye masks ranked among the more effective interventions for subjective sleep quality.[4]

A newer 2026 network meta-analysis of 36 studies again found significant improvements for eye masks, eye masks plus earplugs, music therapy, aromatherapy, and multicomponent interventions compared with controls.[5]

The repeat signal is valuable because it is not coming from one isolated trial.

Still, the setting remains central.

Why ICU evidence may exaggerate the benefit for a normal bedroom

An ICU can have:

• alarms;
• staff conversations;
• hallway light;
• monitor displays;
• repeated checks;
• equipment noise;
• unfamiliar surroundings; and
• little control over the sleep environment.

A dark, quiet bedroom has much less environmental disruption to remove.

That means the same eye mask could produce a large effect in a bright ICU and almost no measurable effect in a bedroom already close to darkness.

This is not a contradiction. It is an example of baseline room for improvement.

Light-blocking may be more reliable than “blue-light blocking”

An opaque eye mask reduces the total amount of light reaching the eyes.

That is a different intervention from blue-light-filtering glasses, which alter spectral composition while still allowing substantial light through.

The evidence for blue-light-blocking glasses is mixed, as reviewed in Blue Light, Screens and Sleep.

An eye mask is a much more direct darkness intervention.

Earplugs make the most sense for unpredictable noise

Earplugs are most useful when the room contains intermittent sound peaks: traffic, doors, snoring from another person, hospital alarms, roommates, or hallway activity.

If the room is already quiet, lowering sound further may not improve sleep.

This parallels the White Noise evidence: both interventions make the most sense when noise itself is the bottleneck, but they solve it differently.

White noise masks acoustic contrast. Earplugs reduce incoming sound.

Earplug type and fit matter

Foam plugs, silicone plugs, custom plugs, and active noise-reduction devices differ in attenuation, comfort, pressure, and frequency response.

Clinical trials do not establish one universal consumer earplug as the best sleep product.

Poorly fitting plugs can also cause discomfort or fall out during the night, and excessive insertion can irritate the ear canal.

The product is simple, but “earplugs” are not a perfectly standardized intervention.

Safety depends on what you need to hear

Reducing sound can create a tradeoff.

Some sleepers need to hear:

• smoke or carbon-monoxide alarms;
• a baby or child;
• a medical device;
• a phone used for emergency call-out; or
• another safety signal.

The goal should not be maximum acoustic isolation at all costs.

Similarly, an eye mask should be comfortable, easy to remove, and not create pressure that causes headaches or eye discomfort.

What about sleeping with a partner who snores?

Earplugs can reduce perceived snoring volume, but they do not treat the partner's snoring or possible sleep apnea.

If snoring is loud, habitual, or accompanied by witnessed breathing pauses, the more important question may be sleep-disordered breathing rather than finding stronger earplugs.

See Sleep Apnea vs Insomnia.

Eye masks can also help shift workers protect daytime sleep

Daytime sleep occurs when ambient light is naturally high.

For shift workers, blackout curtains and eye masks can reduce unwanted daytime light in the sleep environment.

That is particularly relevant because shift-work sleep is already occurring at a biologically difficult time. See Shift Work and Sleep for the broader circadian context.

Again, darkness helps control the environment; it does not fully erase circadian misalignment.

What the evidence does not establish

Current evidence does not justify saying that:

• every sleeper benefits from eye masks or earplugs;
• earplugs alone reliably improve sleep in all settings;
• hospital effect sizes transfer directly to home bedrooms;
• eye masks reliably increase REM or deep sleep in healthy home sleepers;
• maximum darkness and maximum sound isolation are always safer; or
• sensory blocking treats insomnia, sleep apnea, or circadian disorders by itself.

Bottom line

Eye masks and earplugs are among the more defensible low-tech sleep-environment tools.

The evidence supports this hierarchy:

• eye masks: repeated positive subjective sleep-quality signal in clinical environments;
• eye masks + earplugs: often stronger than either alone in noisy/bright settings;
• earplugs alone: more inconsistent in pooled analyses; and
• home use: plausible when light/noise is a real disruptor, but likely smaller in already optimized bedrooms.

The intervention should match the environment. If the room is the problem, fixing the room can be smarter than adding another supplement.