Eccentricity effect
Eccentricity Effect
The Eccentricity Effect (pronunciation: /ɪkˈsɛntrɪsɪti ɪˈfɛkt/) is a phenomenon observed in visual perception and psychophysics.
Etymology
The term "Eccentricity Effect" is derived from the Latin word "excentricus", meaning "out of the center", and the Latin word "effectus", meaning "result". It refers to the effect of eccentricity, or deviation from the center, on visual perception.
Definition
The Eccentricity Effect refers to the decrease in visual acuity and color perception as the distance from the point of fixation increases. This effect is due to the distribution of photoreceptor cells in the retina, with a higher concentration at the center (the fovea) and a lower concentration at the periphery.
Related Terms
- Visual Field: The total area that can be seen while the eye is focused on a central point.
- Fovea: The central part of the retina, where visual acuity is highest.
- Photoreceptor Cells: The cells in the retina that respond to light and enable vision.
- Retina: The light-sensitive layer at the back of the eye, where images are formed.
- Visual Acuity: The sharpness of vision, usually measured with a Snellen chart.
- Color Perception: The ability to distinguish different colors, which varies with the wavelength of light.
See Also
External links
- Medical encyclopedia article on Eccentricity effect
- Wikipedia's article - Eccentricity effect
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