Final answer:
Peripheral vision is also known as side vision. It is the ability to see objects outside of the direct line of sight and is essential for spatial awareness. Tunnel vision, on the other hand, is a loss of peripheral vision.
Step-by-step explanation:
The other name for peripheral vision is side vision (Option A). Peripheral vision refers to the part of the visual field that is on the outer edges of the range of vision, allowing you to see objects to your right and left without turning your head. This is important to contrast with tunnel vision, where only the central visual field is perceived, and often peripheral vision is lost.
Another condition called bilateral hemianopia involves the loss of lateral peripheral vision, but unlike tunnel vision, superior and inferior fields are retained. It's crucial to remember that peripheral vision is an aspect of healthy vision and essential for spatial orientation and detecting motion on the sides of our visual field.