Abstract
Abstract Perceptual fading (PF) is a phenomenon in which a target in the visual field fades from view after a certain fading time (FT). PF is reset by microsaccadic eye movements; however, PF has not been investigated during nonfixation eye movements. We compared PF during voluntary eye movements in healthy volunteers and in patients with involuntary eye oscillations caused by nystagmus. Twelve healthy volunteers performed a PF task consisting of following an oscillating fixation cross moving with either a sine wave (pursuit task) or a square wave (saccadic task) profile while viewing a static peripheral spot of low contrast (1.5x threshold). This was compared to FT during a static fixation cross with peripheral spot moving and also when both were moving. FT was also compared in 4 volunteers with nystagmus.
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