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VR Optics and Why IPD Means Too Many Things

kojackkojack Posts: 5,984 Volunteer Moderator

Tom Forsyth is a former Valve and Oculus developer (and member of this forum). This is an interesting article on Inter Ocular Distance (between eyeball centres), Inter Pupillary Distance (between pupil centres), Inter Axial Distance (between lens centres) and Inter Camera Distance (between cameras in renderer).
(Note: Tom made up the last two terms because there's no convention for them)

Long story short: IOD is what we should be measuring on people. IPD changes based on what you look at (your pupils converge or diverge based on distance). IAD is what the slider on the Rift CV1 / Quest does and ICD is what the renderer is using.


  • Shadowmask72Shadowmask72 Posts: 4,017 Valuable Player
    edited December 2019
    And what about the OCD when my head gets all fuzzy over the usage of acronyms?

    System Specs: RTX 2080 ti , i9 9900K CPU, 16 GB DDR 4 RAM, Win 10 64 Bit OS.
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