An electronics technician is focusing closely on a microchip on their workbench, and then looks up across a large warehouse at a digital clock on the far wall.
State the biological term for the process by which the eye adjusts its focus between objects at different distances.
Describe the physiological changes that occur in the ciliary muscles, the suspensory ligaments, and the lens when the technician shifts their focus from the close-up microchip to the distant digital clock.
The technician then walks from the brightly-lit warehouse into an unlit storage cupboard. Describe how the muscle layers of the iris react to this sudden drop in light intensity, and explain the functional significance of this response.