pupillary reflex dilation and pupillary unrest. Additional chapters focus on traumatic brain injury, cardiac arrest, intensive care, opioid effect, acute pain and anisocoria and provide valuable ...

Iris Coloured part of the eye that contains muscles. These relax or contract to adjust the size of the pupil. Controls how much light enters the pupil. Pupil Hole in the middle of the iris.

The amount of light entering the eye is controlled by a reflex action. The size of the pupil changes in response to bright or dim light. This is controlled by the muscles of the iris.