gray-out
Also found in: Medical, Idioms.
gray-out
A temporary condition in which a person's vision is hazy, restricted, or other-wise impaired because of insufficient oxygen. This is experienced when the body is under positive
g. The person experiencing gray-out sees as if he or she is looking down a foggy tunnel. Gray-out is the precursor to blackout, when vision becomes indistinct. See
G-LOC.
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