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T. D. DUANE, M.D., Ph.D.

AMA Arch Ophthalmol. 1954;51(3):343-355.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

ONE OF the consequences of flying at high velocities is that changes in direction or speed may produce profound physiological effects in the pilot. These accelerative forces are known as g forces (expressed as multiples of the gravitational attractive force). Depending upon how the force is vectored through the body of the subject, it is referred to as a positive, negative, or transverse g force. Military maneuvers, such as gunnery and dive bomb runs and steep inside turns, produce a characteristic group of symptoms culminating in black-out and unconsciousness which are known collectively as the physiological effects of positive g.*

Many authors use the words "black-out" and "unconsciousness" interchangeably. In an effort to counteract this semantic error, the term amaurosis fugax has been substituted as a more accurate and all-inclusive description. However, this is not fully warranted, because clinically amaurosis fugax refers to a temporary loss of vision, such as . . . [Full Text PDF of this Article]

Author Affiliations
JOHNSVILLE, PA.

From the Aviation Medical Acceleration Laboratory Naval Air Development Center.

Footnotes
This work was conducted under Study No. N M 001 060.1201, Phase III.

This work is not to be construed as necessarily reflecting the views of the Department of the Navy.

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