visual field

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.

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.

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.

visual field (VF)

the area of physical space visible to an eye in a given position. The average VF is 65 degrees upward, 75 degrees downward, 60 degrees nasally, and 90 degrees temporally.

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.

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

field

1. an area or open space, such 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.

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auditory field

the space or range within which stimuli will be perceived as sound.

field beans

see phaseolus.

field experiments

experiments conducted on large groups of animals in conditions thought to be average for the particular type of commercial operation.

field fever

leptospirosis.

field fungi

fungi that attack plants that grow in the field. See also storage fungi.

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.

low-power field

the area of a slide visible under the low magnification system of a microscope.

morphogenetic field

an embryonic region out of which definite structures normally develop.

field nettle

see stachys arvensis.

field pea

pisumsativum.

field penny-cress

see thlaspi arvense.

field poppy

see papaverrhoeas.

sequential field trial

a trial to which additional segments are added as results are obtained in original segments, e.g. concentrating efforts on aspects of the work which appear to be promising.

field trial

see field experiments (above).

visual field

the area within which stimuli will produce the sensation of sight with the eye in a straight-ahead position.