Tunnel vision
Tunnel vision is the loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel-like field of vision.
Causes
Tunnel vision can be caused by:
Eyeglass users
Eyeglass users experience tunnel vision ...
is a term used when a shooter is focused on a target, and thus misses what goes on around that target. Therefore an innocent bystander may pass in front or behind of the target and be shot accidentally. This is easily understandable if the bystander is not visible in the
telescopic sight
A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. It is equipped with some form of a referencing pattern – known as a ''reticle'' – mounted in a focally appropriate p ...
(see
Tunnel vision#Optical instruments), but can also happen without one. In this case, the mental concentration of the shooter is so focused on the target, that they fail to notice anything else.
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