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Large pupils in low light

Large pupils in low light

C025/9081

Rights Managed

30.3 MB (2.5 MB compressed)

3979 x 2663 pixels

33.8 x 22.6 cm ⏐ 13.3 x 8.9 in (300dpi)

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Credit

TREVOR CLIFFORD PHOTOGRAPHY / SCIENCE PHOTO LIBRARY TREVOR CLIFFORD PHOTOGRAPHY / SCIENCE PHOTO LIBRARY

Caption

Large pupils in low light. Close-up of a woman's face, showing how a person's pupils become enlarged when exposed to dim lighting conditions. This is caused by a relaxation of the iris sphincter muscle in response to the low light, a response known as the pupillary light reflex.

Release details

Model release available. Property release not required.

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