Tunnel vision
Overview
Peripheral vision
Peripheral vision is a part of vision that occurs outside the very center of gaze. There is a broad set of non-central points in the field of view that is included in the notion of peripheral vision...
with retention of central vision, resulting in a constricted circular tunnel-like field of vision
Visual field
The term visual field is sometimes used as a synonym to field of view, though they do not designate the same thing. The visual field is the "spatial array of visual sensations available to observation in introspectionist psychological experiments", while 'field of view' "refers to the physical...
.
Tunnel vision can be caused by:
- Blood loss (hypovolemiaHypovolemiaIn physiology and medicine, hypovolemia is a state of decreased blood volume; more specifically, decrease in volume of blood plasma...
) - Alcohol consumption causes tunnel vision. In addition, the vision becomes blurred or double since eye muscles lose their precision causing them to be unable to focus on the same object.
- Retinitis pigmentosaRetinitis pigmentosaRetinitis pigmentosa is a group of genetic eye conditions that leads to incurable blindness. In the progression of symptoms for RP, night blindness generally precedes tunnel vision by years or even decades. Many people with RP do not become legally blind until their 40s or 50s and retain some...
, a disease of the eye. - Sustained (1 second or more) high accelerations.
