Inter-pupillary distance
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Interpupillary distance (IPD) is the distance between the centers of the pupils of the eyes. It is also known as interocular distance (IOD).[1]
Most adult humans have an IPD of about 63mm.
IPD can be measured in a number of ways.
Some VR headsets have an IPD adjustment. The Oculus Rift DK1, DK2, and HTC Vive have manual IPD adjustment. And the Valve index too.
Incorrect IPD is the number 1 cause of VR sickness.
Mirror measurement[edit]
IPD can be measured by standing close to a vertical mirror, and closing one eye at a time. Each eye looks directly into that eye on the mirror. Use a marker to mark a spot on the mirror where the pupil is. The distance between the dots is a measurement of IPD.[2]
References[edit]
- ↑ "The Effect of Interocular Distance upon Depth Perception When Using Stereoscopic Displays to Perform Work Within Virtual and Telepresent Environments". https://apps.dtic.mil/sti/pdfs/ADA289764.pdf.
- ↑ How to measure your IPD with a mirror at MTBS' Immersipedia. https://web.archive.org/web/20140328140034/http://www.mtbs3d.com/wiki/index.php?title=How_to_measure_your_IPD_with_a_mirror