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Figure 1 - Humphrey field analyser. Humphrey field analyser (HFA) is a tool for measuring the human visual field that is commonly used by optometrists, orthoptists and ophthalmologists, particularly for detecting monocular visual field. [1] The results of the analyser identify the type of vision defect.
A visual field test is an eye examination that can detect dysfunction in central and peripheral vision which may be caused by various medical conditions such as glaucoma, stroke, pituitary disease, brain tumours or other neurological deficits.
The macula corresponds to the central 17 degrees diameter of the visual field; the fovea to the central 5.2 degrees, and the foveola to 1–1.2 degrees diameter. [ 10 ] [ 11 ] [ 12 ] Note that in the clinical literature the fovea can refer to the central 1–1.2 deg, i.e. what is otherwise known as the foveola, and can be referred to as the ...
It is a diagnostic tool that aids in the detection of visual disturbances caused by changes in the retina, particularly the macula (e.g. macular degeneration, Epiretinal membrane), as well as the optic nerve and the visual pathway to the brain. Amsler grid usually help detecting defects in central 20 degrees of the visual field. [2]
A History of the Mind received positive reviews from the science journalist Marek Kohn in New Statesman and Society, [4] Francisca Goldsmith in Library Journal, [5] and from Publishers Weekly, [6] mixed reviews from the biologist Lewis Wolpert in New Scientist and the psychologist George Armitage Miller in The New York Times Book Review, [7] [8] and negative reviews from John C. Marshall in ...
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Harry R. Humphries (born November 17, 1940) is a former United States Navy SEAL who currently works as a consultant and actor in Hollywood films. After graduating from Admiral Farragut Academy and attending Rutgers University in New Jersey, Humphries joined the Navy where he was assigned to UDT 22 and SEAL Team 2.
The book was known by the nickname "Tante Frieda" [1] or "T.F." [2] A modified form is still in use today by the Federal German Army (Deutsches Heer). [citation needed] The approximate equivalent U.S. Army field-manual was FM 100–5, now re-issued as FM 3–0, Operations (with later revisions) and available for download at the U.S. Army ...