Results 191 to 200 of about 2,029 (230)

Analysis of flicker fusion critical frequency by the iteration method

Human Physiology, 2006
Two methods of the presentation of light stimuli for determining the flicker fusion critical frequency were compared: the classic method using a continuous increase in flicker frequency and a new iteration method in which impulses of fixed duration were presented step by step.
V V, Rozhentsov, T A, Korniushina, A A, Feĭgin   +2 more
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The modification of critical flicker fusion frequency by an adapting stimulus of flickering light

Vision Research, 1965
Abstract The critical flicker fusion frequency is elevated by adaptation to intermittent light of high frequency and depressed by intermittent light of lower frequency. This relationship is almost linear between adapting frequencies of 24 and 54 c/s.
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Critical flicker fusion frequency of the river lamprey (Lampetra fluviatilis)

Vision Research, 1979
Abstract Enucleated eyes of the river lamprey ( Lampetra fluviatilis ) were investigated by flicker stimulation. The critical fusion frequencies (CFF's) of the ERG were determined at various intensities of the stimulating light. The relation between CFF and light intensity shows two phases. On the average, the shift between these two phases occurs at
T, Dreyfert, K, Holmberg, G, Struwe
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An ecological correlate of critical flicker-fusion frequencies for someAnolis lizards

Vision Research, 1974
Abstract The maximum critical flicker-fusion frequency (CFF) was determined for seven species of anoline lizards. The congeners showed a wide range of CFF values from 26 to 42. These values correlated with the general level of insolation in each species' microhabitat such that the brighter the habitat, the higher the CFF.
T A, Jenssen, B, Swenson
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Critical flicker fusion frequency measurement through a chamber porthole

Diving and Hyperbaric Medicine Journal
The critical flicker fusion frequency (cFFF) is a non-invasive measure of central nervous system function and cortical arousal, increasingly used in diving and hyperbaric medicine to assess the effects of breathing gases under pressure. This feasibility study aimed to evaluate whether cFFF can be reliably measured through the porthole of a hyperbaric ...
Jochen D, Schipke, Thomas, Muth, Anne-Kathrin, Brebeck, Sven, Dreyer   +3 more
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Longitudinal changes in critical flicker fusion frequency: an indicator of human workload

Ergonomics, 2005
The aim of the study was to verify a hypothesis that critical flicker fusion frequency (CFFF) is season-related because of changes in the intensity and duration of sunlight. CFFF has a wide application in different fields, generally as an indicator of human workload.
Anna, Luczak, Andrzej, Sobolewski
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The Relationship Between Critical Flicker Fusion Frequency (CFFF) and Temperamenta Characteristics

International Journal of Occupational Safety and Ergonomics, 2000
The analysis in this paper was based on data obtained from 80 male participants, aged 29-65. Critical Flicker Fusion Frequency (CFFF) was measured using the Flicker Test. The Formal Characteristics of Behaviour Temperament Inventory (FCB-TI) by Strelau and Zawadzki (1993) was used for temperamental characteristics.
A, Luczak, A, Sobolewski
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Critical Flicker Fusion Frequency: Relation to Resting Systolic Blood Pressure

Optometry and Vision Science, 2004
ABSTRACT: Objective. Past studies have shown that a number of factors, both acute and chronic, influence individual differences in critical flicker fusion frequency (CFF). In this study, we assessed whether CFF co‐varied with resting systolic blood pressure (SBP).
Audrey H, Gutherie, Billy R, Hammond
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Critical flicker fusion frequency in age‐related macular degeneration

Acta Ophthalmologica, 2008
Abstract Purpose To discuss the influence of AMD on critical flicker fusion frequency (CFF) Methods CFF was measured centrally for red, green and blue signal and in 10° excentricity with a red signal. 33 patients with non exsudative AMD and a visual acuity (VA) of 20/100‐20/20, 12 patients with exsudative AMD (VA: 20/100‐20/25) and 45 age‐matched ...
MM MAIER, T GRONEBERG, H SPECHT, CP LOHMANN   +3 more
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Critical flicker fusion frequency in early chloroquine retinopathy.

Canadian journal of ophthalmology. Journal canadien d'ophtalmologie, 1983
Since increasing numbers of patients with connective tissue diseases are taking chloroquine and its derivatives, there is an urgent need for a simple, reasonably fast method of screening for toxic effects on the retina. Measurement of the critical flicker fusion frequency is one technique for assessing retinal function. Its screening value was assessed
A R, Al Khamis, M, Easterbrook
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