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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Trevor Clifford Photography |
Taille de l’image : | 3979 px × 2663 px |
Model Release : | Disponible |
Property Release : | Non requis |
Restrictions : | - |