Virtual Reality 101: Why does IPD matter?

Pupillary distance or interpupillary distance (IPD) is the distance measured in millimeters between the centers of the pupils of the eyes. Everyone is different and the value changes based on whether you’re looking at something close up or far away. But why does this matter to the virtual reality participant?

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Image courtesy of https://endmyopia.org
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Even binoculars let you adjust for IPD.
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She must have an IPD of 64mm …

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