visual field


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Related to visual field: perimetry, visual acuity, Visual pathway

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.

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.
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
References in periodicals archive ?
To be included in the study, visual field defects had to be present, visual acuity had to be greater than 0.1 (decimal notation, equivalent to 1.0 logMAR), and participants had to have sufficient and recent driving experience, defined as a minimum of 2000 km during the last 2 years.
* Be able to interpret visual field plots and manage the patient appropriately (Group 2.1.2)
Chen and Zhao also reported that the sensitivity of the icVEP in 15% positive contrast and 10 Hz temporal modulation was 80% and the specificity was 90% for diagnosing early POAG, but they defined GON as a cup-disc ratio ≥0.6 or vertical cup/disc diameter ratio asymmetry ≥0.2 and did not analyze the MD of the visual field test.[20] With different GON criterion, the sensitivity of the icVEP was 62.5% and the specificity was 92.3% for diagnosing early POAG in the current study, which might be due to the smaller MD of the visual field test.
At later stages, it leads to the degeneration of photoreceptors and retinal pigment epithelium degeneration by binding on melanin (9,10) and the resulting functional loss in visual field, decreased visual acuity and impairment of color vision.
No abnormal findings were observed for the visual fields before and after RALP, and there was no visual field progression after the procedure.
Unlike POAG, NAION is characterized by optic disc swelling with resolution over weeks, visual field defects, morphological alteration, pallor of the optic disc, and relatively preserved neuroretinal rim.
OCT computes RNFL thickness measurements and is able to identify diffuse and focal RNFL defects reproducibly that occur in glaucoma that have been shown to correlate quantitatively with Visual Field (VF) abnormalities.
Progressive decrease in bilateral visual acuity, pale optic discs, abnormal VEP, loss of central visual field, and demyelinating spot in the brain MRI suggested IDON by excluding other optic neuropathies.
The higher the power of the prism, the more the images are displaced and the greater the visual field is enhanced.
We see much better in the center of our visual field (along the visual axis) than in the periphery.
Notable creatives such as fashion photographer Mark Nicdao, independent filmmaker Pepe Diokno, Inksurge, fashion videographer Fold Canela, stylist Maita Baello from Qurator Studios, writer Cai Subijano of Preen.ph, and entrepreneur Edric Chua of Satchmi will be invited to give an exclusive look inside their respective visual fields as they encourage the participants to start a career in the visual arts.