Circa Diem Study Tested Premature Infant Sleep Care
Researchers studied whether eye masks and ear plugs improve outcomes for premature babies in intensive care units.
Updated on Oct. 7, 2026 in Babies
Live Poll
Should hospitals implement circadian rhythm interventions like eye masks and ear plugs for premature babies?
The Circa Diem study, which launched in 2019, evaluated the use of eye masks and ear plugs to shield 869 premature infants from the disruptive light and noise of neonatal intensive care units. Researchers examined whether creating artificial day-night cycles could help improve developmental outcomes for these newborns.
Why it matters
Premature infants often face developmental challenges because hospital environments lack the natural light and sound cycles that help regulate early circadian rhythms. This research seeks to determine if a simple, low-cost intervention can protect vulnerable babies from the stress of constant hospital exposure.
The study recruited 869 premature babies across 11 centers in Australia and New Zealand, with 500 participants located in Western Australia. The intervention cost is approximately $60 per baby for the duration of a hospital stay.
The players
National Health and Medical Research Council
The primary Australian government agency responsible for funding health and medical research, including large-scale clinical trials.
Circa Diem
A research initiative focused on examining the impact of circadian rhythm disruption on premature infants in neonatal intensive care units.
The details
Babies in the intervention group were fitted with specialized eye masks and ear plugs during nighttime hours while in hospital care. This process aimed to mitigate the impact of hospital noise and constant light on infant brain development. The study was expanded beyond Western Australia with funding support from the National Health and Medical Research Council.
Timeline
The Circa Diem study began in Western Australia in 2019.
The first results of the study are expected to be presented in November 2026.
The Home Front
This research follows a pattern set by the National Health and Medical Research Council in prioritizing evidence-based, low-cost interventions for high-risk neonatal populations. The findings represent a broader shift toward optimizing NICU environments to mimic healthy development cycles.
Parents of premature infants should consult with their neonatologist regarding the appropriate use of light and sound aids in hospital environments. Do not attempt to use eye masks or ear coverings on an infant without direct medical supervision, as these items can pose significant safety risks.
The takeaway
The Circa Diem study highlights the importance of managing sensory input for premature babies to support long-term development. Families can look forward to the release of initial results in November 2026 to better understand how hospital sleep environments impact infant health.
Further reading
Learn more about infant development and care in the Babies section.
Source note: This article includes information reported by The West Australian.
Live Poll
Should hospitals implement circadian rhythm interventions like eye masks and ear plugs for premature babies?
