Circa Diem Study Tested Premature Infant Sleep Aids
Researchers studied the impact of eye masks and ear plugs on premature babies starting in 2019.
Updated on Oct. 7, 2026 in Babies
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Should hospitals implement circadian rhythm interventions like eye masks and ear plugs for premature babies?
The Circa Diem study, which launched in Western Australia in 2019, evaluated the use of eye masks and ear plugs to mitigate circadian rhythm disruption in premature infants. Researchers hypothesize that providing a more natural night-time environment can improve developmental outcomes in neonatal intensive care units.
Why it matters
Premature birth often disrupts the natural maternal circadian rhythm influence, and standard hospital environments lack essential day-night cycles. Researchers believe this light and noise exposure contributes to developmental complications in infants.
The intervention costs approximately $60 per baby for the duration of a hospital stay. The study recruited 869 premature babies, with more than 500 participants located in Western Australia.
The players
National Health and Medical Research Council
This organization is the primary government body responsible for funding medical research and clinical trials across Australia.
The details
Babies were assigned to either a control group or an intervention group that was fitted with eye masks and ear plugs at night under constant hospital monitoring. The National Health and Medical Research Council funded the study's expansion to include sites across Australia and New Zealand.
Timeline
The Circa Diem study began in Western Australia in 2019.
First results of the study are expected to be presented in November 2026.
Culture Shift
The study reflects a broader medical shift toward humanizing neonatal intensive care through the regulation of sensory environments. This movement aligns with contemporary efforts to reduce developmental stressors in high-risk pediatric populations.
The study provides insights into how basic environmental modifications like ear plugs and eye masks can influence long-term health outcomes for high-risk infants. Parents of premature babies may see these methods adopted as standard care in neonatal units following the study's results.
The takeaway
The Circa Diem study highlights the significant role that environmental factors play in the development of premature infants in clinical settings. Future results may confirm whether simple sensory protection measures are effective tools for improving long-term health outcomes.
What happens next
The Circa Diem Kids follow-up study will continue to monitor the sight, hearing, sleep, and lung health of participants as they reach ages five to eight.
Further reading
For more research on infant development, visit the Babies section.
Source note: This article includes information reported by The West Australian.
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Should hospitals implement circadian rhythm interventions like eye masks and ear plugs for premature babies?
