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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Trevor Clifford Photography |
Bildgröße: | 3979 px × 2663 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |