This article is taken from the monthly Sciences et Avenir – La Recherche ndeg931, dated September 2024.
Our pupils are smallest at the very beginning of inhalation, then enlarge to their maximum size as we begin to exhale. They then rapidly constrict until the end of exhalation.
Read alsoJust hearing the words "sun" or "night" causes pupils to change size
A specialized camera used
Unusual, this unprecedented observation was made on 100 volunteers using a specialized camera. A study conducted by Karolinska Institute, a medical university located in Sweden.
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