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The visual system's ability to perceive rapid changes in light intensity over time. It is a measure of how quickly the photoreceptors and neural pathways can encode and process visual stimuli.
read more about temporal light sensitivity ...The standard measure is the Critical Flicker Fusion (CFF) frequency. This is the highest frequency (in Hertz) at which a flickering light source is perceived as a steady, continuous light.
The visual system is more sensitive to low temporal frequencies (slow changes, like clouds moving) and less sensitive to very high frequencies (fast changes, like a flickering LED).
CFF testing can be used in specialized research to detect subtle neuro-ophthalmic changes, fatigue, or the effects of drugs on the visual processing speed.
Yes. Displays must refresh faster than the human CFF (typically around $60 ext{ Hz}$ or higher) to appear stable and flicker-free.
Yes. The temporal sensitivity is slightly higher in the peripheral retina than in the fovea.
Diseases that slow down neuronal transmission, such as multiple sclerosis or optic nerve damage, can lead to a measurable decrease in the CFF.