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What does DA stand for?

DA stands for Dark Adaptation

This definition appears very frequently and is found in the following Acronym Finder categories:

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We have 118 other meanings of DA in our Acronym Attic

Samples in periodicals archive:

Affected individuals first experience defective dark adaptation or nyctalopia (night blindness), followed by reduction of the peripheral visual field (known as tunnel vision) and, sometimes, loss of central vision late in the course of the disease.
Dark adaptation and averted vision One basic technique that observers soon learn is to allow the eyes 20 minutes or more to adjust to darkness in order to become sensitive to faint light (dark adaptation).
The RP patients first experience defective dark adaptation or "night blindness," followed by reduction of the peripheral visual field known as tunnel vision, sometimes followed by loss of central vision late in the course of the disease.
Byline: Mickey McMonagle WATCHMEN (18) **** A film comic book fans have waited more than 20 years for, this dramatic, dark adaptation of the graphic novel is the movie event of 2009.