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critical fusion frequency

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frequency, critical fusion (CFF)

Frequency of a light stimulation at which it becomes perceived as a stable and continuous sensation. That frequency depends upon various factors: luminance, colour, contrast, retinal eccentricity, etc. Syn. critical flicker frequency. See Brücke-Bartley effect; flicker; Ferry-Porter law; Granit-Harper law; Talbot-Plateau law; flicker photometer.

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