Changes

==Causes==

==Causes==

===Virtual and augmented reality===

===Virtual and augmented reality===

Examples of fixed-focus biscopic gadgets that can cause focal conflict include the [[Oculus Quest 2]], [[HTC Vive]], [[Valve Index]] and the [[Microsoft HoloLens]]. Focal conflict can be experienced by bringing a virtual object very close to one's eyes in the headset and trying to focus on it.<ref>{{Citation |title=Vergence-Accommodation Conflict: Facebook Research Explains Why Varifocal Matters For Future VR |url=https://www.youtube.com/watch?v=YWA4gVibKJE |language=en |access-date=2022-09-22|publisher=VR Trailers & Clips|date =18 July 2020| via=YouTube|format=Video}}</ref>

Examples of fixed-focus biscopic gadgets that can cause focal conflict include the [[Meta Quest 3S]], [[HTC Vive]], [[Valve Index]] and the [[Microsoft HoloLens]]. Focal conflict can be experienced by bringing a virtual object very close to one's eyes in the headset and trying to focus on it.<ref>{{Citation |title=Vergence-Accommodation Conflict: Facebook Research Explains Why Varifocal Matters For Future VR |url=https://www.youtube.com/watch?v=YWA4gVibKJE |language=en |access-date=2022-09-22|publisher=VR Trailers & Clips|date =18 July 2020| via=YouTube|format=Video}}</ref>

Stereoscopic displays such as [[holographic display]]s and [[light field display]]s can remove the problem.<ref name="kramida" />

Stereoscopic displays such as [[holographic display]]s and [[light field display]]s can remove the problem.<ref name="kramida" />