visual field
Học thuậtThân thiện
A person's visual field includes everything they can see without moving their eyes.
Definition
Noun: The entire area of physical space that can be seen by an eye when it is fixed in one position, without moving the head or the eye itself. It is the extent of the observable world that is visible at any given instant.
Usage
The term "visual field" is used in scientific, medical, and technical contexts, particularly in ophthalmology, optometry, neurology, and psychology. It describes the spatial array of visual stimuli available to observation. It is typically measured for each eye separately (monocular visual field) or for both eyes together (binocular visual field).
Examples
- The optometrist tested the patient's visual field to check for any blind spots.
- A car's side mirror is designed to expand the driver's visual field.
- The study mapped how different colors are perceived across the human visual field.
- Glaucoma often causes a gradual loss of peripheral visual field.
Advanced Usage
- Visual field defect: A specific area of reduced or absent vision within the visual field, often resulting from damage to the visual pathway (e.g., from a stroke, glaucoma, or retinal detachment).
- Visual field test (perimetry): The clinical procedure used to measure the extent and sensitivity of a person's visual field.
- Visual field of view (FOV): Often used in optics and photography to describe the angular extent of the observable world seen through an optical instrument or camera lens.
Variants and Related Words
- Field of vision: A common synonym for visual field, though sometimes used more informally.
- Peripheral vision: The part of the visual field that is outside the very center of gaze.
- Central vision: The part of the visual field corresponding to the fovea of the retina, responsible for sharp, detailed sight.
Synonyms
- Field of view
- Field of vision
- Sightline (in a more specific, linear sense)
Antonyms
- Blind spot (a specific area within the visual field where no vision occurs)
- Scotoma (the medical term for a blind spot or area of depressed vision within the visual field)
A person's visual field includes everything they can see without moving their eyes.
Noun
- all of the points of the physical environment that can be perceived by a stable eye at a given moment