visual field

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field

 [fēld]
1. an area or open space, as an operative field or visual field.
2. a range of specialization in knowledge, study, or occupation.
3. in embryology, the developing region within a range of modifying factors.
auditory field the space or range within which stimuli will be perceived as sound.
disturbed energy field a nursing diagnosis defined as a disruption of the flow of energy surrounding a person's being that results in disharmony of the body, mind, and/or spirit.
energy field the flow of energy surrounding a person.
extended field in radiation therapy, such as for malignant lymphoma, an area of irradiation beyond the involved field. See also under irradiation.
high-power field the area of a slide visible under the high magnification system of a microscope.
individuation field a region in which an organizer influences adjacent tissue to become a part of a total embryo.
inverted Y field in radiation therapy, such as for malignant lymphoma, a circumscribed area of irradiation below the diaphragm, covering the spleen, extending down the midline, and branching inferiorly to form tails across the inguinal areas.
involved field in radiation therapy, such as for malignant lymphoma, the irradiated area when irradiation has been limited to sites of detectable macroscopic disease. See also under irradiation.
low-power field the area of a slide visible under the low magnification system of a microscope.
magnetic field that portion of space about a magnet in which its action is perceptible.
mantle field in radiation therapy, such as for malignant lymphoma, a circumscribed area of irradiation around the shoulders and chest, including the neck, clavicular regions, axillae, and mediastinum. See also under irradiation.
morphogenetic field an embryonic region out of which definite structures normally develop.
operating field (operative field) an isolated area where surgery is performed; it must be kept sterile by aseptic techniques (see surgical asepsis). Called also surgical field.
sterile field an operative field that is properly sterile according to surgical asepsis. It includes having all furniture and equipment covered with sterile drapes and all personnel being properly attired.
surgical field operative field.
visual field (F) (vf) the area within which stimuli will produce the sensation of sight with the eye in a straight-ahead position.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

vis·u·al field (F),

the area simultaneously visible to one eye without movement; often measured by means of a bowl perimeter located 330 mm from the eye.
Farlex Partner Medical Dictionary © Farlex 2012

visual field

n.
The space or range within which objects are visible to the immobile eyes at a given time. Also called field of vision.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

vis·u·al field

(F) (vizh'ū-ăl fēld)
The area simultaneously visible to one eye without movement; often measured by means of a bowl perimeter located 330 mm from the eye.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Enlarge picture
VISUAL FIELD

visual field

The area within which objects may be seen when the eye is fixed.
Synonym: field of vision See: illustration; perimetry
See also: field
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Potential of stratus optical coherence tomography for detecting early glaucoma in perimetrically normal eyes of open-angle glaucoma patients with unilateral visual field loss. J Glaucoma 2010;19:61-5.
Samuels, "Screening for glaucomatous visual field loss with frequency-doubling perimetry," Investigative Ophthalmology & Visual Science, vol.
Lowering IOP by 30% or more slows the rate of visual field (VF) loss.6 Greater IOP fluctuation increases visual field loss by 30% and IOP progression is the only factor associated with VF progression7.
Indications for Filtration Surgery: Patients with exfoliation glaucoma were mainly subjected to filtration surgery due to failed medical therapy; which was either due to continued raise in intraocular pressure (>21mmHg) despite maximal tolerable medical treatment (60%); or due to both increased intraocular pressure and continued field loss (16%); or intolerance to medical therapy (12%); or due to progression of visual field loss despite intraocular pressure being <21mmHg (8%); or due to poor compliance (4%) (Table-4).
Predictive factors of the optic nerve head for development or progression of glaucomatous visual field loss. Invest Ophthalmol Vis Sci 2004;45:2613-8.
The game will use principles derived from existing programs used in adults with visual field loss, whereby patients have to search for hard-to-find objects on a computer screen (a 'visual search' task), but the game will be modified to make the task more stimulating and fun for children and structured to maximize the efficiency of learning.
Glaucoma is a chronic progressive disease and one of the most frequent causes leading to blindness in the Western world, characterized by damage of the optic nerve and visual field loss. The pathogenic concepts of glaucoma may be divided into a mechanical, pressure-related, and a vascular approach.
This severely limits the ability to determine progression of visual field loss in areas that already demonstrate damage.
It found that, on July 19, 2008, she had a consultation with Patient A in which she conducted visual field tests that showed "superior temporal visual field loss" in both the right and left eye.
The only signs are gradually progressive visual field loss, and optic nerve changes.
In the early stages of glaucoma there are usually no symptoms, but as disease progresses it can cause visual field loss and at last blindness.