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: == Non-medical effects == === Eyeglass users === Eyeglass users experience tunnel vision to varying degrees due to the corrective lens only providing a small area of proper focus, with the rest of the field of view beyond the lenses being unfocused and blurry.
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: == Non-medical effects == === Eyeglass users === Eyeglass users experience tunnel vision to varying degrees due to the corrective lens only providing a small area of proper focus, with the rest of the field of view beyond the lenses being unfocused and blurry.
Source: Wikipedia "Tunnel vision" · CC BY-SA 4.0
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