Definitions for "Tunnel vision"
Eye condition in which the field of vision is 20 degrees or less.
visual impairment involving a loss of peripheral vision
The loss of peripheral vision so that only objects directly ahead can be seen; most commonly due to damage caused by increased pressure within the eye (glaucoma).
Keywords:  acuity, sensation, extent, visual, thus
Contraction of the visual field to such an extent that only a small area of central acuity remains, thus giving the affected individual the sensation of looking through a tunnel.
Keywords:  aware, focused, intently, him, front
Refers to a player who has focused so intently on the player or players directly in front of him that he is not aware of players moving to the side of him.
Keywords:  infrared, receiver, see
See infrared receiver.