Flicker fusion threshold
Flicker fusion threshold
The Flicker fusion threshold (pronounced: /ˈflɪkər ˈfjuːʒən θrɛʃˌhəʊld/), also known as the critical flicker fusion (CFF), is a concept in Psychophysics and Vision science that refers to the frequency at which an intermittent light stimulus appears to be completely steady to the average human observer.
Etymology
The term "Flicker fusion threshold" is derived from the English words "flicker" (meaning to shine with a light that is not steady; twinkle), "fusion" (the process or result of joining two or more things together to form a single entity) and "threshold" (the magnitude or intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur or be manifested).
Definition
The Flicker fusion threshold is used to measure the speed at which the eye can process light. It is the frequency at which flickering light is perceived as a solid beam. This threshold can vary depending on factors such as brightness, size, and location of the stimulus, as well as the specific individual's vision.
Related Terms
- Temporal resolution: The ability of the sensory system to detect changes in a stimulus over time.
- Visual perception: The ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment.
- Critical flicker fusion: A psychophysical measure of the speed of processing in the visual system.
See Also
External links
- Medical encyclopedia article on Flicker fusion threshold
- Wikipedia's article - Flicker fusion threshold
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