Beyond biology, "tunnel vision" also describes a physiological response to extreme stress or intense focus:
Tunnel vision is often a symptom of serious underlying eye conditions: Tunnel Vision
: Significant trouble seeing in low-light environments. or the loss of peripheral vision
: High eye pressure damages the optic nerve, often starting with the outer edges of vision. causing sudden vision loss.
Tunnel vision, or the loss of peripheral vision, is a condition where your visual field is restricted to a small central area, much like looking through a tube or binoculars. It typically occurs when the "rod" cells in the retina, which are responsible for side and night vision, stop functioning correctly.
: When the retina pulls away from the back of the eye, causing sudden vision loss.
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