It is this point--called the critical flicker fusion
measure--that indicates the person's level of executive functioning.
At the second stage ophthalmological status (acuity of vision and refraction) was estimated as well as functional (critical flicker fusion
frequency -CFFF) electrophysiological (electrosensitivity threshold -EST; electrolabilityEL), phychophysiological (channel capacity- CC, visual information volume -VIV, visual information speed -VIS, efficiency of visual information analysis -EVIA) investigations were carried out [4, 5].
The foveal critical flicker fusion
threshold is 10 Hz
Eye's Response at flicker fusion
to square-wave modulation of a test field surrounded by a large steady field of equal mean luminance.
The temporal resolution of the eye was evaluated by determining the values of the slope of the exponential function, slope b, by least-squares fit, instead of using the critical flicker fusion
To address this issue, electro-retinography was used to measure the changes in retinal light sensitivity, flicker fusion
frequency, and spectral sensitivity in black rockfish (Sebastes melanops) subjected to rapid decompression (from 4 atmospheres absolute [ATA] to 1 ATA) and Pacific halibut (Hippoglossus stenolepis) exposed to 15 minutes of simulated sunlight.
In addition, what appears to a human as a fluidly moving image on a television screen may actually appear to flicker to a cat, because the flicker fusion
rate (the frequency at which a rapidly flickering light appears to be constant) of its retina is higher than the rate at which the television screen is refreshed.
Thus, he concluded that physical factors can account for the major part of the senile variation in flicker fusion
When measured by means of the flicker fusion
frequency (FFF), this effect is present only when normal eye movements are permitted.
Louise Dye consider the menstrual cycle as a biological rhythm and shows that, although cognitive functioning does not show a monthly pattern in women, visual sensitivity (as measured by critical flicker fusion
Objective cognitive assessments included: Critical Flicker Fusion
(measures central nervous system arousal via information-processing capacity and the ability to discriminate bits of sensory information), Sternberg Short-Term Memory Scanning Task (assesses working memory), and Rapid Visual Information Processing (assesses the performance of attention mechanisms in remaining vigilant to periodically recurring events).
plebs eye was quantified using two methods: (1) response waveform dynamics, and (2) flicker fusion