bar reader

bar reader

A device used in ORTHOPTICS consisting of a narrow opaque strip fixed between the reader's eyes and the printed page so that different parts of the page are occluded from each eye. The method is used to promote single binocular vision.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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A test for simultaneous binocular vision and for detecting ocular suppression. It consists of five equally spaced opaque, parallel bars crossed by two perpendicular bars. It is held between the reader's eyes and a page of print. The bars being perpendicular to the lines of the text occlude some letters (along vertical strips) to one eye, but these letters are seen by the other eye. If binocular vision is present no difficulty is experienced in reading the page. This instrument represents the most common type of bar reader.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
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The items glided from trolley to carrier via the bar reader as if nature had intended it.
Just over 30, Daum has been anthologized in The KGB Bar Reader and championed by Thomas Beller, the novelist-scenester-editor of the literary journal Open City.
But a wide range of scholars, such as those represented in the BAR reader, are now providing reliable information and possible interpretations of these manuscripts that, as Shanks notes, "ignited the imagination of nonscholar and scholar alike."
The five articles we now present to BAR readers in this second issue of volume 15 are an illustration of the variety of BPA/MS/OS topics of interest to BAR and of authorship origin.
Although great for reading multiple lines of text it is important to remember that bar readers only elongate the text in the vertical meridian, causing a certain amount of distortion.