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Smearing is the perception of motion blur that reduces the details of the image in [[VR]]. Smearing along with [[strobing]] is part of the [[judder]] phenomenon in [[head-mounted display]]s. Because smearing reduces the visual quality of the display, it can ruin a user's [[immersion]].
Smearing occurs when each pixel moves across the retina while it is lit. The longer the pixels are lit and the more movement of the [[HMD]], the more smearing occurs.
Smearing can be eliminated by either having really high [[refresh rate]], about 1000 Hz is needed, or using a [[low persistence]] display, a more practical method employed by most [[HMD]]s.
[[Category:Terms]]
