Abstract
To investigate whether the dissociation of vergence and accommodation is responsible for visual fatigue in watching stereoscopic images, we studied the visual fatigue after approximately one hour of watching a simulated stereoscopic image system without vergence change using prisms. Fatigue was assessed by subjective reports of symptoms, accommodation step responses, relative vergence limits, and visual evoked potentials (VEP). The results showed that when the amount of dissociation was large, relative vergence limits decreased after watching which means visual fatigue. After subjects took some rests, their relative vergence limits recovered.
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